1275572961 has 48 divisors (see below), whose sum is σ = 2154129600. Its totient is φ = 743603328.

The previous prime is 1275572957. The next prime is 1275572981. The reversal of 1275572961 is 1692755721.

1275572961 is a `hidden beast` number, since 1 + 2 + 7 + 557 + 2 + 96 + 1 = 666.

It is not a de Polignac number, because 1275572961 - 2² = 1275572957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275572981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79341 + ... + 94053.

It is an arithmetic number, because the mean of its divisors is an integer number (44877700).

Almost surely, 2^1275572961 is an apocalyptic number.

It is an amenable number.

1275572961 is a deficient number, since it is larger than the sum of its proper divisors (878556639).

1275572961 is a wasteful number, since it uses less digits than its factorization.

1275572961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14767 (or 14748 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 1275572961 is about 35715.1643003361. The cubic root of 1275572961 is about 1084.5138473427.

The spelling of 1275572961 in words is "one billion, two hundred seventy-five million, five hundred seventy-two thousand, nine hundred sixty-one".