125221751 has 2 divisors, whose sum is σ = 125221752. Its totient is φ = 125221750.

The previous prime is 125221717. The next prime is 125221763. The reversal of 125221751 is 157122521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125221751 - 2⁶ = 125221687 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125221751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125221781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62610875 + 62610876.

It is an arithmetic number, because the mean of its divisors is an integer number (62610876).

Almost surely, 2^125221751 is an apocalyptic number.

125221751 is a deficient number, since it is larger than the sum of its proper divisors (1).

125221751 is an equidigital number, since it uses as much as digits as its factorization.

125221751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 26.

The square root of 125221751 is about 11190.2524993853. The cubic root of 125221751 is about 500.2954933330.

The spelling of 125221751 in words is "one hundred twenty-five million, two hundred twenty-one thousand, seven hundred fifty-one".