15721052 has 12 divisors (see below), whose sum is σ = 28708176. Its totient is φ = 7518720.

The previous prime is 15721021. The next prime is 15721067. The reversal of 15721052 is 25012751.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85349 + ... + 85532.

It is an arithmetic number, because the mean of its divisors is an integer number (2392348).

Almost surely, 2^15721052 is an apocalyptic number.

It is an amenable number.

15721052 is a deficient number, since it is larger than the sum of its proper divisors (12987124).

15721052 is a wasteful number, since it uses less digits than its factorization.

15721052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170908 (or 170906 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 15721052 is about 3964.9781840510. The cubic root of 15721052 is about 250.5112311914.

The spelling of 15721052 in words is "fifteen million, seven hundred twenty-one thousand, fifty-two".