13157772 has 12 divisors (see below), whose sum is σ = 30701496. Its totient is φ = 4385920.

The previous prime is 13157737. The next prime is 13157773. The reversal of 13157772 is 27775131.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (13157773) 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, 548229 + ... + 548252.

It is an arithmetic number, because the mean of its divisors is an integer number (2558458).

Almost surely, 2^13157772 is an apocalyptic number.

13157772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13157772 is an abundant number, since it is smaller than the sum of its proper divisors (17543724).

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

13157772 is a wasteful number, since it uses less digits than its factorization.

13157772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096488 (or 1096486 counting only the distinct ones).

The product of its digits is 10290, while the sum is 33.

The square root of 13157772 is about 3627.3643324045. The cubic root of 13157772 is about 236.0808637957.

The spelling of 13157772 in words is "thirteen million, one hundred fifty-seven thousand, seven hundred seventy-two".