15406642 has 16 divisors (see below), whose sum is σ = 24678720. Its totient is φ = 7196112.

The previous prime is 15406639. The next prime is 15406649. The reversal of 15406642 is 24660451.

15406642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15406642.

It is not an unprimeable number, because it can be changed into a prime (15406649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1917 + ... + 5872.

It is an arithmetic number, because the mean of its divisors is an integer number (1542420).

Almost surely, 2^15406642 is an apocalyptic number.

15406642 is a deficient number, since it is larger than the sum of its proper divisors (9272078).

15406642 is a wasteful number, since it uses less digits than its factorization.

15406642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 15406642 is about 3925.1295520021. The cubic root of 15406642 is about 248.8299565361.

The spelling of 15406642 in words is "fifteen million, four hundred six thousand, six hundred forty-two".