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1276561441 = 357292
BaseRepresentation
bin100110000010110…
…1100100000100001
310021222002001002101
41030011230200201
510103244431231
6330401050401
743430410321
oct11405544041
93258061071
101276561441
115a5649561
122b7626a01
1317461c6cc
14c177d281
1577110661
hex4c16c821

1276561441 has 3 divisors (see below), whose sum is σ = 1276597171. Its totient is φ = 1276525712.

The previous prime is 1276561427. The next prime is 1276561471. The reversal of 1276561441 is 1441656721.

The square root of 1276561441 is 35729.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 1264513600 = 3471^2 + 35560^2 .

It is not a de Polignac number, because 1276561441 - 223 = 1268172833 is a prime.

It is a super-2 number, since 2×12765614412 = 3259218225295992962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1276561441.

It is not an unprimeable number, because it can be changed into a prime (1276561471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17865 + ... + 53593.

Almost surely, 21276561441 is an apocalyptic number.

1276561441 is the 35729-th square number.

1276561441 is the 17865-th centered octagonal number.

It is an amenable number.

1276561441 is a deficient number, since it is larger than the sum of its proper divisors (35730).

1276561441 is an frugal number, since it uses more digits than its factorization.

1276561441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71458 (or 35729 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The cubic root of 1276561441 is about 1084.7939158520.

The spelling of 1276561441 in words is "one billion, two hundred seventy-six million, five hundred sixty-one thousand, four hundred forty-one".

Divisors: 1 35729 1276561441