15864242 has 8 divisors (see below), whose sum is σ = 23814000. Its totient is φ = 7926244.

The previous prime is 15864241. The next prime is 15864257. The reversal of 15864242 is 24246851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 15864199 and 15864208.

It is not an unprimeable number, because it can be changed into a prime (15864241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309 + ... + 6087.

It is an arithmetic number, because the mean of its divisors is an integer number (2976750).

Almost surely, 2^15864242 is an apocalyptic number.

15864242 is a deficient number, since it is larger than the sum of its proper divisors (7949758).

15864242 is a wasteful number, since it uses less digits than its factorization.

15864242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5880.

The product of its digits is 15360, while the sum is 32.

The square root of 15864242 is about 3982.9940999203. The cubic root of 15864242 is about 251.2694999015.

The spelling of 15864242 in words is "fifteen million, eight hundred sixty-four thousand, two hundred forty-two".