13157145 has 12 divisors (see below), whose sum is σ = 22805796. Its totient is φ = 7017120.

The previous prime is 13157129. The next prime is 13157149. The reversal of 13157145 is 54175131.

It can be written as a sum of positive squares in 2 ways, for example, as 8696601 + 4460544 = 2949^2 + 2112^2 .

It is not a de Polignac number, because 13157145 - 2⁴ = 13157129 is a prime.

It is a super-2 number, since 2×13157145² = 346220929102050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13157149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146146 + ... + 146235.

It is an arithmetic number, because the mean of its divisors is an integer number (1900483).

Almost surely, 2^13157145 is an apocalyptic number.

13157145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13157145 is a deficient number, since it is larger than the sum of its proper divisors (9648651).

13157145 is a wasteful number, since it uses less digits than its factorization.

13157145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292392 (or 292389 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 13157145 is about 3627.2779049861. The cubic root of 13157145 is about 236.0771137927.

The spelling of 13157145 in words is "thirteen million, one hundred fifty-seven thousand, one hundred forty-five".