1275601872 has 20 divisors (see below), whose sum is σ = 3295304960. Its totient is φ = 425200608.

The previous prime is 1275601871. The next prime is 1275601903. The reversal of 1275601872 is 2781065721.

It is a self number, because there is not a number n which added to its sum of digits gives 1275601872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275601871) 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, 13287472 + ... + 13287567.

It is an arithmetic number, because the mean of its divisors is an integer number (164765248).

Almost surely, 2^1275601872 is an apocalyptic number.

1275601872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1275601872 is an abundant number, since it is smaller than the sum of its proper divisors (2019703088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275601872 is a wasteful number, since it uses less digits than its factorization.

1275601872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26575050 (or 26575044 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 1275601872 is about 35715.5690420858. The cubic root of 1275601872 is about 1084.5220408222.

The spelling of 1275601872 in words is "one billion, two hundred seventy-five million, six hundred one thousand, eight hundred seventy-two".