13645131 has 8 divisors (see below), whose sum is σ = 18370560. Its totient is φ = 9008232.

The previous prime is 13645127. The next prime is 13645157. The reversal of 13645131 is 13154631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13645131 - 2² = 13645127 is a prime.

It is a super-2 number, since 2×13645131² = 372379200014322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13645171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21771 + ... + 22388.

It is an arithmetic number, because the mean of its divisors is an integer number (2296320).

Almost surely, 2^13645131 is an apocalyptic number.

13645131 is a deficient number, since it is larger than the sum of its proper divisors (4725429).

13645131 is a wasteful number, since it uses less digits than its factorization.

13645131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44265.

The product of its digits is 1080, while the sum is 24.

The square root of 13645131 is about 3693.9316452799. The cubic root of 13645131 is about 238.9603816147.

Adding to 13645131 its reverse (13154631), we get a palindrome (26799762).

The spelling of 13645131 in words is "thirteen million, six hundred forty-five thousand, one hundred thirty-one".