15861125 has 16 divisors (see below), whose sum is σ = 22623744. Its totient is φ = 10875600.

The previous prime is 15861121. The next prime is 15861163. The reversal of 15861125 is 52116851.

It is not a de Polignac number, because 15861125 - 2² = 15861121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15861121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8189 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (1413984).

Almost surely, 2^15861125 is an apocalyptic number.

It is an amenable number.

15861125 is a deficient number, since it is larger than the sum of its proper divisors (6762619).

15861125 is an equidigital number, since it uses as much as digits as its factorization.

15861125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18149 (or 18139 counting only the distinct ones).

The product of its digits is 2400, while the sum is 29.

The square root of 15861125 is about 3982.6027921449. The cubic root of 15861125 is about 251.2530423796.

Adding to 15861125 its reverse (52116851), we get a palindrome (67977976).

The spelling of 15861125 in words is "fifteen million, eight hundred sixty-one thousand, one hundred twenty-five".