13251997 has 8 divisors (see below), whose sum is σ = 14673312. Its totient is φ = 11866800.

The previous prime is 13251989. The next prime is 13252039. The reversal of 13251997 is 79915231.

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

It is not a de Polignac number, because 13251997 - 2³ = 13251989 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 (13251947) 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 7 ways as a sum of consecutive naturals, for example, 8254 + ... + 9727.

It is an arithmetic number, because the mean of its divisors is an integer number (1834164).

Almost surely, 2^13251997 is an apocalyptic number.

It is an amenable number.

13251997 is a deficient number, since it is larger than the sum of its proper divisors (1421315).

13251997 is a wasteful number, since it uses less digits than its factorization.

13251997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18059.

The product of its digits is 17010, while the sum is 37.

The square root of 13251997 is about 3640.3292433515. The cubic root of 13251997 is about 236.6430620731.

The spelling of 13251997 in words is "thirteen million, two hundred fifty-one thousand, nine hundred ninety-seven".