125215440 has 160 divisors (see below), whose sum is σ = 450137856. Its totient is φ = 28200960.

The previous prime is 125215439. The next prime is 125215451. The reversal of 125215440 is 44512521.

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 125215440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122130 + ... + 123150.

Almost surely, 2^125215440 is an apocalyptic number.

125215440 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 125215440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225068928).

125215440 is an abundant number, since it is smaller than the sum of its proper divisors (324922416).

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

125215440 is a wasteful number, since it uses less digits than its factorization.

125215440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1111 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 125215440 is about 11189.9705093445. The cubic root of 125215440 is about 500.2870884622.

Adding to 125215440 its reverse (44512521), we get a palindrome (169727961).

The spelling of 125215440 in words is "one hundred twenty-five million, two hundred fifteen thousand, four hundred forty".