125696820 has 48 divisors (see below), whose sum is σ = 352820160. Its totient is φ = 33436416.

The previous prime is 125696819. The next prime is 125696833. The reversal of 125696820 is 28696521.

It is a super-2 number, since 2×125696820² = 31599381116224800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24216 + ... + 28944.

It is an arithmetic number, because the mean of its divisors is an integer number (7350420).

Almost surely, 2^125696820 is an apocalyptic number.

125696820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125696820 is an abundant number, since it is smaller than the sum of its proper divisors (227123340).

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

125696820 is a wasteful number, since it uses less digits than its factorization.

125696820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5184 (or 5182 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 125696820 is about 11211.4593162532. The cubic root of 125696820 is about 500.9273722314.

The spelling of 125696820 in words is "one hundred twenty-five million, six hundred ninety-six thousand, eight hundred twenty".