1282272661 has 4 divisors (see below), whose sum is σ = 1282890924. Its totient is φ = 1281654400.

The previous prime is 1282272587. The next prime is 1282272679. The reversal of 1282272661 is 1662722821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372104100 + 910168561 = 19290^2 + 30169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1282272661 - 2⁷ = 1282272533 is a prime.

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 1282272661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282276661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306010 + ... + 310171.

It is an arithmetic number, because the mean of its divisors is an integer number (320722731).

Almost surely, 2^1282272661 is an apocalyptic number.

It is an amenable number.

1282272661 is a deficient number, since it is larger than the sum of its proper divisors (618263).

1282272661 is an equidigital number, since it uses as much as digits as its factorization.

1282272661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618262.

The product of its digits is 32256, while the sum is 37.

The square root of 1282272661 is about 35808.8349573119. The cubic root of 1282272661 is about 1086.4092657658.

The spelling of 1282272661 in words is "one billion, two hundred eighty-two million, two hundred seventy-two thousand, six hundred sixty-one".