1257165696 has 32 divisors (see below), whose sum is σ = 3339347400. Its totient is φ = 419055104.

The previous prime is 1257165607. The next prime is 1257165697. The reversal of 1257165696 is 6965617521.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257165697) 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, 1636551 + ... + 1637318.

Almost surely, 2^1257165696 is an apocalyptic number.

1257165696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1257165696 is an abundant number, since it is smaller than the sum of its proper divisors (2082181704).

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

1257165696 is an equidigital number, since it uses as much as digits as its factorization.

1257165696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273886 (or 3273874 counting only the distinct ones).

The product of its digits is 680400, while the sum is 48.

The square root of 1257165696 is about 35456.5324869762. The cubic root of 1257165696 is about 1079.2718273959.

The spelling of 1257165696 in words is "one billion, two hundred fifty-seven million, one hundred sixty-five thousand, six hundred ninety-six".