1275155656 has 16 divisors (see below), whose sum is σ = 2414131200. Its totient is φ = 631387344.

The previous prime is 1275155633. The next prime is 1275155657. The reversal of 1275155656 is 6565515721.

It is not an unprimeable number, because it can be changed into a prime (1275155657) 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, 772936 + ... + 774583.

It is an arithmetic number, because the mean of its divisors is an integer number (150883200).

Almost surely, 2^1275155656 is an apocalyptic number.

It is an amenable number.

1275155656 is a deficient number, since it is larger than the sum of its proper divisors (1138975544).

1275155656 is a wasteful number, since it uses less digits than its factorization.

1275155656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547628 (or 1547624 counting only the distinct ones).

The product of its digits is 315000, while the sum is 43.

The square root of 1275155656 is about 35709.3216961622. The cubic root of 1275155656 is about 1084.3955678382.

The spelling of 1275155656 in words is "one billion, two hundred seventy-five million, one hundred fifty-five thousand, six hundred fifty-six".