15421055 has 16 divisors (see below), whose sum is σ = 20231904. Its totient is φ = 11214720.

The previous prime is 15421033. The next prime is 15421061. The reversal of 15421055 is 55012451.

It is a happy number.

It is not a de Polignac number, because 15421055 - 2⁶ = 15420991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15421055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2585 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (1264494).

Almost surely, 2^15421055 is an apocalyptic number.

15421055 is a deficient number, since it is larger than the sum of its proper divisors (4810849).

15421055 is a wasteful number, since it uses less digits than its factorization.

15421055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 15421055 is about 3926.9651131631. The cubic root of 15421055 is about 248.9075262921.

The spelling of 15421055 in words is "fifteen million, four hundred twenty-one thousand, fifty-five".