13056121 has 4 divisors (see below), whose sum is σ = 14060452. Its totient is φ = 12051792.

The previous prime is 13056107. The next prime is 13056151. The reversal of 13056121 is 12165031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3686400 + 9369721 = 1920^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 13056121 - 2⁷ = 13055993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13056101) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 502146 + ... + 502171.

It is an arithmetic number, because the mean of its divisors is an integer number (3515113).

Almost surely, 2^13056121 is an apocalyptic number.

It is an amenable number.

13056121 is a deficient number, since it is larger than the sum of its proper divisors (1004331).

13056121 is a wasteful number, since it uses less digits than its factorization.

13056121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004330.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 13056121 is about 3613.3254766212. The cubic root of 13056121 is about 235.4713401022.

The spelling of 13056121 in words is "thirteen million, fifty-six thousand, one hundred twenty-one".