13612157 has 4 divisors (see below), whose sum is σ = 14659260. Its totient is φ = 12565056.

The previous prime is 13612141. The next prime is 13612169. The reversal of 13612157 is 75121631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6584356 + 7027801 = 2566^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 13612157 - 2⁴ = 13612141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13612117) 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, 523532 + ... + 523557.

It is an arithmetic number, because the mean of its divisors is an integer number (3664815).

Almost surely, 2^13612157 is an apocalyptic number.

It is an amenable number.

13612157 is a deficient number, since it is larger than the sum of its proper divisors (1047103).

13612157 is a wasteful number, since it uses less digits than its factorization.

13612157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047102.

The product of its digits is 1260, while the sum is 26.

The square root of 13612157 is about 3689.4656794718. The cubic root of 13612157 is about 238.7677406113.

Adding to 13612157 its reverse (75121631), we get a palindrome (88733788).

It can be divided in two parts, 13 and 612157, that multiplied together give a square (7958041 = 2821²).

The spelling of 13612157 in words is "thirteen million, six hundred twelve thousand, one hundred fifty-seven".