15056421 has 16 divisors (see below), whose sum is σ = 21626880. Its totient is φ = 9290160.

The previous prime is 15056411. The next prime is 15056429. The reversal of 15056421 is 12465051.

It is not a de Polignac number, because 15056421 - 2¹⁴ = 15040037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15056391 and 15056400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15056429) 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, 1381 + ... + 5658.

It is an arithmetic number, because the mean of its divisors is an integer number (1351680).

Almost surely, 2^15056421 is an apocalyptic number.

It is an amenable number.

15056421 is a deficient number, since it is larger than the sum of its proper divisors (6570459).

15056421 is a wasteful number, since it uses less digits than its factorization.

15056421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 15056421 is about 3880.2604294042. The cubic root of 15056421 is about 246.9300342189.

The spelling of 15056421 in words is "fifteen million, fifty-six thousand, four hundred twenty-one".