125679221 has 4 divisors (see below), whose sum is σ = 126146700. Its totient is φ = 125211744.

The previous prime is 125679187. The next prime is 125679223. The reversal of 125679221 is 122976521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122976521 = 17 ⋅7233913.

It can be written as a sum of positive squares in 2 ways, for example, as 56040196 + 69639025 = 7486^2 + 8345^2 .

It is a cyclic number.

It is not a de Polignac number, because 125679221 - 2⁶ = 125679157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125679223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 233336 + ... + 233873.

It is an arithmetic number, because the mean of its divisors is an integer number (31536675).

Almost surely, 2^125679221 is an apocalyptic number.

It is an amenable number.

125679221 is a deficient number, since it is larger than the sum of its proper divisors (467479).

125679221 is an equidigital number, since it uses as much as digits as its factorization.

125679221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467478.

The product of its digits is 15120, while the sum is 35.

The square root of 125679221 is about 11210.6744221746. The cubic root of 125679221 is about 500.9039926097.

The spelling of 125679221 in words is "one hundred twenty-five million, six hundred seventy-nine thousand, two hundred twenty-one".