13230921 has 16 divisors (see below), whose sum is σ = 19519488. Its totient is φ = 7904400.

The previous prime is 13230907. The next prime is 13230949. The reversal of 13230921 is 12903231.

It is a happy number.

13230921 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 not a de Polignac number, because 13230921 - 2⁶ = 13230857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13230901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481 + ... + 5166.

It is an arithmetic number, because the mean of its divisors is an integer number (1219968).

Almost surely, 2^13230921 is an apocalyptic number.

13230921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13230921 is a deficient number, since it is larger than the sum of its proper divisors (6288567).

13230921 is a wasteful number, since it uses less digits than its factorization.

13230921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5732.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 13230921 is about 3637.4332983575. The cubic root of 13230921 is about 236.5175429896.

The spelling of 13230921 in words is "thirteen million, two hundred thirty thousand, nine hundred twenty-one".