12455121 has 32 divisors (see below), whose sum is σ = 20072448. Its totient is φ = 6716160.

The previous prime is 12455117. The next prime is 12455129. The reversal of 12455121 is 12155421.

12455121 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12455121 - 2² = 12455117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

12455121 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12455129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51561 + ... + 51801.

It is an arithmetic number, because the mean of its divisors is an integer number (627264).

Almost surely, 2^12455121 is an apocalyptic number.

It is an amenable number.

12455121 is a deficient number, since it is larger than the sum of its proper divisors (7617327).

12455121 is a wasteful number, since it uses less digits than its factorization.

12455121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 400, while the sum is 21.

The square root of 12455121 is about 3529.1813498317. The cubic root of 12455121 is about 231.8013621294.

The spelling of 12455121 in words is "twelve million, four hundred fifty-five thousand, one hundred twenty-one".