13921512 has 32 divisors (see below), whose sum is σ = 37968480. Its totient is φ = 4218560.

The previous prime is 13921493. The next prime is 13921513. The reversal of 13921512 is 21512931.

13921512 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13921512² = 387616992732288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (13921513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26103 + ... + 26630.

It is an arithmetic number, because the mean of its divisors is an integer number (1186515).

Almost surely, 2^13921512 is an apocalyptic number.

13921512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13921512 is an abundant number, since it is smaller than the sum of its proper divisors (24046968).

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

13921512 is a wasteful number, since it uses less digits than its factorization.

13921512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52753 (or 52749 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 13921512 is about 3731.1542450025. The cubic root of 13921512 is about 240.5629838943.

The spelling of 13921512 in words is "thirteen million, nine hundred twenty-one thousand, five hundred twelve".