125959721 has 8 divisors (see below), whose sum is σ = 134188320. Its totient is φ = 117891072.

The previous prime is 125959709. The next prime is 125959739. The reversal of 125959721 is 127959521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125959721 - 2⁶ = 125959657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125959741) 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, 38360 + ... + 41513.

It is an arithmetic number, because the mean of its divisors is an integer number (16773540).

Almost surely, 2^125959721 is an apocalyptic number.

It is an amenable number.

125959721 is a deficient number, since it is larger than the sum of its proper divisors (8228599).

125959721 is an equidigital number, since it uses as much as digits as its factorization.

125959721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79975.

The product of its digits is 56700, while the sum is 41.

The square root of 125959721 is about 11223.1778476508. The cubic root of 125959721 is about 501.2763670021.

The spelling of 125959721 in words is "one hundred twenty-five million, nine hundred fifty-nine thousand, seven hundred twenty-one".