125221679 has 8 divisors (see below), whose sum is σ = 141012480. Its totient is φ = 110165400.

The previous prime is 125221661. The next prime is 125221687. The reversal of 125221679 is 976122521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125221679 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 (125221639) 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 7 ways as a sum of consecutive naturals, for example, 183269 + ... + 183950.

It is an arithmetic number, because the mean of its divisors is an integer number (17626560).

Almost surely, 2^125221679 is an apocalyptic number.

125221679 is a deficient number, since it is larger than the sum of its proper divisors (15790801).

125221679 is a wasteful number, since it uses less digits than its factorization.

125221679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367261.

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

The square root of 125221679 is about 11190.2492822993. The cubic root of 125221679 is about 500.2953974463.

The spelling of 125221679 in words is "one hundred twenty-five million, two hundred twenty-one thousand, six hundred seventy-nine".