15420074 has 16 divisors (see below), whose sum is σ = 24382080. Its totient is φ = 7299600.

The previous prime is 15420073. The next prime is 15420079. The reversal of 15420074 is 47002451.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15420073) 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 7 ways as a sum of consecutive naturals, for example, 2987 + ... + 6305.

It is an arithmetic number, because the mean of its divisors is an integer number (1523880).

Almost surely, 2^15420074 is an apocalyptic number.

15420074 is a deficient number, since it is larger than the sum of its proper divisors (8962006).

15420074 is a wasteful number, since it uses less digits than its factorization.

15420074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 15420074 is about 3926.8402055597. The cubic root of 15420074 is about 248.9022481521.

The spelling of 15420074 in words is "fifteen million, four hundred twenty thousand, seventy-four".