13257406 has 8 divisors (see below), whose sum is σ = 19911744. Its totient is φ = 6620160.

The previous prime is 13257401. The next prime is 13257443. The reversal of 13257406 is 60475231.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13257401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2115 + ... + 5566.

It is an arithmetic number, because the mean of its divisors is an integer number (2488968).

Almost surely, 2^13257406 is an apocalyptic number.

13257406 is a deficient number, since it is larger than the sum of its proper divisors (6654338).

13257406 is an equidigital number, since it uses as much as digits as its factorization.

13257406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8546.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 13257406 is about 3641.0720948644. The cubic root of 13257406 is about 236.6752541573.

The spelling of 13257406 in words is "thirteen million, two hundred fifty-seven thousand, four hundred six".