125001720 has 48 divisors (see below), whose sum is σ = 406256760. Its totient is φ = 33333696.

The previous prime is 125001713. The next prime is 125001733. The reversal of 125001720 is 27100521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 125001693 and 125001702.

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 11 ways as a sum of consecutive naturals, for example, 173254 + ... + 173973.

Almost surely, 2^125001720 is an apocalyptic number.

125001720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125001720 is an abundant number, since it is smaller than the sum of its proper divisors (281255040).

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

125001720 is a wasteful number, since it uses less digits than its factorization.

125001720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347244 (or 347237 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 125001720 is about 11180.4168079728. The cubic root of 125001720 is about 500.0022933228.

The spelling of 125001720 in words is "one hundred twenty-five million, one thousand, seven hundred twenty".