13521400 has 24 divisors (see below), whose sum is σ = 31437720. Its totient is φ = 5408480.

The previous prime is 13521397. The next prime is 13521419. The reversal of 13521400 is 412531.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 33604 + ... + 34003.

It is an arithmetic number, because the mean of its divisors is an integer number (1309905).

Almost surely, 2^13521400 is an apocalyptic number.

13521400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13521400 is an abundant number, since it is smaller than the sum of its proper divisors (17916320).

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

13521400 is a wasteful number, since it uses less digits than its factorization.

13521400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67623 (or 67614 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13521400 is about 3677.1456321446. The cubic root of 13521400 is about 238.2359076046.

Adding to 13521400 its reverse (412531), we get a palindrome (13933931).

The spelling of 13521400 in words is "thirteen million, five hundred twenty-one thousand, four hundred".