15125440 has 56 divisors (see below), whose sum is σ = 39300912. Its totient is φ = 5498880.

The previous prime is 15125423. The next prime is 15125441. The reversal of 15125440 is 4452151.

15125440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15125441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372 + ... + 5668.

It is an arithmetic number, because the mean of its divisors is an integer number (701802).

Almost surely, 2^15125440 is an apocalyptic number.

15125440 is a gapful number since it is divisible by the number (10) 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 15125440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19650456).

15125440 is an abundant number, since it is smaller than the sum of its proper divisors (24175472).

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

15125440 is a wasteful number, since it uses less digits than its factorization.

15125440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4325 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 15125440 is about 3889.1438646571. The cubic root of 15125440 is about 247.3067702422.

Adding to 15125440 its reverse (4452151), we get a palindrome (19577591).

Subtracting from 15125440 its reverse (4452151), we obtain a square (10673289 = 3267²).

The spelling of 15125440 in words is "fifteen million, one hundred twenty-five thousand, four hundred forty".