1265652156 has 24 divisors (see below), whose sum is σ = 3001603024. Its totient is φ = 414967680.

The previous prime is 1265652151. The next prime is 1265652163. The reversal of 1265652156 is 6512565621.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265652151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863785 + ... + 865248.

Almost surely, 2^1265652156 is an apocalyptic number.

It is an amenable number.

1265652156 is an abundant number, since it is smaller than the sum of its proper divisors (1735950868).

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

1265652156 is a wasteful number, since it uses less digits than its factorization.

1265652156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729101 (or 1729099 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 1265652156 is about 35576.0053406787. The cubic root of 1265652156 is about 1081.6949141156.

The spelling of 1265652156 in words is "one billion, two hundred sixty-five million, six hundred fifty-two thousand, one hundred fifty-six".