15252140 has 24 divisors (see below), whose sum is σ = 32896752. Its totient is φ = 5935680.

The previous prime is 15252131. The next prime is 15252157. The reversal of 15252140 is 4125251.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9566 + ... + 11045.

It is an arithmetic number, because the mean of its divisors is an integer number (1370698).

Almost surely, 2^15252140 is an apocalyptic number.

15252140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15252140 is an abundant number, since it is smaller than the sum of its proper divisors (17644612).

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

15252140 is a wasteful number, since it uses less digits than its factorization.

15252140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20657 (or 20655 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 15252140 is about 3905.3988272646. The cubic root of 15252140 is about 247.9953823282.

Adding to 15252140 its reverse (4125251), we get a palindrome (19377391).

The spelling of 15252140 in words is "fifteen million, two hundred fifty-two thousand, one hundred forty".