15420902 has 32 divisors (see below), whose sum is σ = 27965952. Its totient is φ = 6234624.

The previous prime is 15420901. The next prime is 15420907. The reversal of 15420902 is 20902451.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420901) 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, 26438 + ... + 27014.

It is an arithmetic number, because the mean of its divisors is an integer number (873936).

Almost surely, 2^15420902 is an apocalyptic number.

15420902 is a deficient number, since it is larger than the sum of its proper divisors (12545050).

15420902 is a wasteful number, since it uses less digits than its factorization.

15420902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 15420902 is about 3926.9456324222. The cubic root of 15420902 is about 248.9067031107.

The spelling of 15420902 in words is "fifteen million, four hundred twenty thousand, nine hundred two".