15909252 has 12 divisors (see below), whose sum is σ = 37121616. Its totient is φ = 5303080.

The previous prime is 15909247. The next prime is 15909259. The reversal of 15909252 is 25290951.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (15909259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662874 + ... + 662897.

It is an arithmetic number, because the mean of its divisors is an integer number (3093468).

Almost surely, 2^15909252 is an apocalyptic number.

15909252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15909252 is an abundant number, since it is smaller than the sum of its proper divisors (21212364).

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

15909252 is a wasteful number, since it uses less digits than its factorization.

15909252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325778 (or 1325776 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 15909252 is about 3988.6403698504. The cubic root of 15909252 is about 251.5069093141.

It can be divided in two parts, 15909 and 252, that added together give a palindrome (16161).

The spelling of 15909252 in words is "fifteen million, nine hundred nine thousand, two hundred fifty-two".