125221424040 has 128 divisors (see below), whose sum is σ = 441958032000. Its totient is φ = 31428117504.

The previous prime is 125221424033. The next prime is 125221424051. The reversal of 125221424040 is 40424122521.

It is a happy number.

125221424040 is a `hidden beast` number, since 1 + 252 + 2 + 1 + 4 + 2 + 404 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 125221423995 and 125221424013.

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, 3391810 + ... + 3428529.

It is an arithmetic number, because the mean of its divisors is an integer number (3452797125).

Almost surely, 2^125221424040 is an apocalyptic number.

125221424040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125221424040 is an abundant number, since it is smaller than the sum of its proper divisors (316736607960).

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

125221424040 is a wasteful number, since it uses less digits than its factorization.

125221424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820376 (or 6820366 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 125221424040 its reverse (40424122521), we get a palindrome (165645546561).

The spelling of 125221424040 in words is "one hundred twenty-five billion, two hundred twenty-one million, four hundred twenty-four thousand, forty".