15057121 has 4 divisors (see below), whose sum is σ = 15942852. Its totient is φ = 14171392.

The previous prime is 15057089. The next prime is 15057143. The reversal of 15057121 is 12175051.

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 13395600 + 1661521 = 3660^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 15057121 - 2⁵ = 15057089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15057092 and 15057101.

It is not an unprimeable number, because it can be changed into a prime (15057191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442840 + ... + 442873.

It is an arithmetic number, because the mean of its divisors is an integer number (3985713).

Almost surely, 2^15057121 is an apocalyptic number.

It is an amenable number.

15057121 is a deficient number, since it is larger than the sum of its proper divisors (885731).

15057121 is an equidigital number, since it uses as much as digits as its factorization.

15057121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885730.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 15057121 is about 3880.3506284871. The cubic root of 15057121 is about 246.9338608996.

The spelling of 15057121 in words is "fifteen million, fifty-seven thousand, one hundred twenty-one".