15921342 has 24 divisors (see below), whose sum is σ = 34682544. Its totient is φ = 5278464.

The previous prime is 15921317. The next prime is 15921349. The reversal of 15921342 is 24312951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15921349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1183 + ... + 5765.

It is an arithmetic number, because the mean of its divisors is an integer number (1445106).

Almost surely, 2^15921342 is an apocalyptic number.

15921342 is an abundant number, since it is smaller than the sum of its proper divisors (18761202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15921342 is a wasteful number, since it uses less digits than its factorization.

15921342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784 (or 4781 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 15921342 is about 3990.1556360623. The cubic root of 15921342 is about 251.5706028304.

The spelling of 15921342 in words is "fifteen million, nine hundred twenty-one thousand, three hundred forty-two".