13621974 has 32 divisors (see below), whose sum is σ = 28844160. Its totient is φ = 4288680.

The previous prime is 13621969. The next prime is 13621991. The reversal of 13621974 is 47912631.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40989 + ... + 41319.

It is an arithmetic number, because the mean of its divisors is an integer number (901380).

Almost surely, 2^13621974 is an apocalyptic number.

13621974 is an abundant number, since it is smaller than the sum of its proper divisors (15222186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13621974 is an equidigital number, since it uses as much as digits as its factorization.

13621974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 355 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 13621974 is about 3690.7958491361. The cubic root of 13621974 is about 238.8251260707.

The spelling of 13621974 in words is "thirteen million, six hundred twenty-one thousand, nine hundred seventy-four".