125312420 has 24 divisors (see below), whose sum is σ = 263390400. Its totient is φ = 50080352.

The previous prime is 125312413. The next prime is 125312431. The reversal of 125312420 is 24213521.

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

It is a junction number, because it is equal to n+sod(n) for n = 125312392 and 125312401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29171 + ... + 33189.

It is an arithmetic number, because the mean of its divisors is an integer number (10974600).

Almost surely, 2^125312420 is an apocalyptic number.

125312420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125312420 is an abundant number, since it is smaller than the sum of its proper divisors (138077980).

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

125312420 is a wasteful number, since it uses less digits than its factorization.

125312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587 (or 5585 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 125312420 is about 11194.3030153735. The cubic root of 125312420 is about 500.4162134366.

Adding to 125312420 its reverse (24213521), we get a palindrome (149525941).

The spelling of 125312420 in words is "one hundred twenty-five million, three hundred twelve thousand, four hundred twenty".