15871942 has 4 divisors (see below), whose sum is σ = 23807916. Its totient is φ = 7935970.

The previous prime is 15871937. The next prime is 15871943. The reversal of 15871942 is 24917851.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15871943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3967984 + ... + 3967987.

It is an arithmetic number, because the mean of its divisors is an integer number (5951979).

Almost surely, 2^15871942 is an apocalyptic number.

15871942 is a deficient number, since it is larger than the sum of its proper divisors (7935974).

15871942 is an equidigital number, since it uses as much as digits as its factorization.

15871942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7935973.

The product of its digits is 20160, while the sum is 37.

The square root of 15871942 is about 3983.9605921746. The cubic root of 15871942 is about 251.3101460752.

The spelling of 15871942 in words is "fifteen million, eight hundred seventy-one thousand, nine hundred forty-two".