13931045 has 4 divisors (see below), whose sum is σ = 16717260. Its totient is φ = 11144832.

The previous prime is 13931039. The next prime is 13931069. The reversal of 13931045 is 54013931.

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 2411809 + 11519236 = 1553^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 13931045 - 2⁸ = 13930789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393100 + ... + 1393109.

It is an arithmetic number, because the mean of its divisors is an integer number (4179315).

Almost surely, 2^13931045 is an apocalyptic number.

It is an amenable number.

13931045 is a deficient number, since it is larger than the sum of its proper divisors (2786215).

13931045 is an equidigital number, since it uses as much as digits as its factorization.

13931045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786214.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13931045 is about 3732.4315131024. The cubic root of 13931045 is about 240.6178812759.

Adding to 13931045 its reverse (54013931), we get a palindrome (67944976).

The spelling of 13931045 in words is "thirteen million, nine hundred thirty-one thousand, forty-five".