125617820 has 24 divisors (see below), whose sum is σ = 264080544. Its totient is φ = 50193216.

The previous prime is 125617783. The next prime is 125617823. The reversal of 125617820 is 28716521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125617823) 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, 19529 + ... + 25151.

It is an arithmetic number, because the mean of its divisors is an integer number (11003356).

Almost surely, 2^125617820 is an apocalyptic number.

125617820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125617820 is an abundant number, since it is smaller than the sum of its proper divisors (138462724).

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

125617820 is a wasteful number, since it uses less digits than its factorization.

125617820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6747 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 125617820 is about 11207.9355815422. The cubic root of 125617820 is about 500.8224065533.

The spelling of 125617820 in words is "one hundred twenty-five million, six hundred seventeen thousand, eight hundred twenty".