1274521601 has 4 divisors (see below), whose sum is σ = 1274622804. Its totient is φ = 1274420400.

The previous prime is 1274521571. The next prime is 1274521681. The reversal of 1274521601 is 1061254721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1061254721 = 1361 ⋅779761.

It can be written as a sum of positive squares in 2 ways, for example, as 1261954576 + 12567025 = 35524^2 + 3545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1274521601 is a prime.

It is a super-2 number, since 2×1274521601² = 3248810622831206402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1274521681) 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, 28490 + ... + 57971.

It is an arithmetic number, because the mean of its divisors is an integer number (318655701).

Almost surely, 2^1274521601 is an apocalyptic number.

It is an amenable number.

1274521601 is a deficient number, since it is larger than the sum of its proper divisors (101203).

1274521601 is an equidigital number, since it uses as much as digits as its factorization.

1274521601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101202.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1274521601 is about 35700.4425882929. The cubic root of 1274521601 is about 1084.2158040524.

The spelling of 1274521601 in words is "one billion, two hundred seventy-four million, five hundred twenty-one thousand, six hundred one".