15125640 has 32 divisors (see below), whose sum is σ = 45377280. Its totient is φ = 4033472.

The previous prime is 15125623. The next prime is 15125647. The reversal of 15125640 is 4652151.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 15125640.

It is not an unprimeable number, because it can be changed into a prime (15125647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62904 + ... + 63143.

It is an arithmetic number, because the mean of its divisors is an integer number (1418040).

Almost surely, 2^15125640 is an apocalyptic number.

15125640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15125640 is an abundant number, since it is smaller than the sum of its proper divisors (30251640).

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

15125640 is a wasteful number, since it uses less digits than its factorization.

15125640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126061 (or 126057 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 15125640 is about 3889.1695771720. The cubic root of 15125640 is about 247.3078602631.

Adding to 15125640 its reverse (4652151), we get a palindrome (19777791).

The spelling of 15125640 in words is "fifteen million, one hundred twenty-five thousand, six hundred forty".