1275331681 has 16 divisors (see below), whose sum is σ = 1409954560. Its totient is φ = 1146337920.

The previous prime is 1275331663. The next prime is 1275331751. The reversal of 1275331681 is 1861335721.

It is not a de Polignac number, because 1275331681 - 2⁵ = 1275331649 is a prime.

It is a super-2 number, since 2×1275331681² = 3252941793124571522, 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 1275331681.

It is not an unprimeable number, because it can be changed into a prime (1275331621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66466 + ... + 83476.

It is an arithmetic number, because the mean of its divisors is an integer number (88122160).

Almost surely, 2^1275331681 is an apocalyptic number.

It is an amenable number.

1275331681 is a deficient number, since it is larger than the sum of its proper divisors (134622879).

1275331681 is a wasteful number, since it uses less digits than its factorization.

1275331681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17176.

The product of its digits is 30240, while the sum is 37.

The square root of 1275331681 is about 35711.7863036841. The cubic root of 1275331681 is about 1084.4454629095.

The spelling of 1275331681 in words is "one billion, two hundred seventy-five million, three hundred thirty-one thousand, six hundred eighty-one".