15625872 has 60 divisors (see below), whose sum is σ = 45361680. Its totient is φ = 5207328.

The previous prime is 15625871. The next prime is 15625889. The reversal of 15625872 is 27852651.

It is a happy number.

15625872 is a `hidden beast` number, since 15 + 62 + 587 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (15625871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1879 + ... + 5897.

It is an arithmetic number, because the mean of its divisors is an integer number (756028).

Almost surely, 2^15625872 is an apocalyptic number.

15625872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15625872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22680840).

15625872 is an abundant number, since it is smaller than the sum of its proper divisors (29735808).

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

15625872 is an equidigital number, since it uses as much as digits as its factorization.

15625872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042 (or 4024 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 15625872 is about 3952.9573739164. The cubic root of 15625872 is about 250.0046505802.

The spelling of 15625872 in words is "fifteen million, six hundred twenty-five thousand, eight hundred seventy-two".