13557407 has 4 divisors (see below), whose sum is σ = 13605936. Its totient is φ = 13508880.

The previous prime is 13557391. The next prime is 13557437. The reversal of 13557407 is 70475531.

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

It is a cyclic number.

It is not a de Polignac number, because 13557407 - 2⁴ = 13557391 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 (13557437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23843 + ... + 24404.

It is an arithmetic number, because the mean of its divisors is an integer number (3401484).

Almost surely, 2^13557407 is an apocalyptic number.

13557407 is a deficient number, since it is larger than the sum of its proper divisors (48529).

13557407 is an equidigital number, since it uses as much as digits as its factorization.

13557407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48528.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 13557407 is about 3682.0384300004. The cubic root of 13557407 is about 238.4471913751.

The spelling of 13557407 in words is "thirteen million, five hundred fifty-seven thousand, four hundred seven".