125166719 has 2 divisors, whose sum is σ = 125166720. Its totient is φ = 125166718.

The previous prime is 125166689. The next prime is 125166721. The reversal of 125166719 is 917661521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125166719 - 2⁸ = 125166463 is a prime.

It is a super-2 number, since 2×125166719² = 31333415090449922, which contains 22 as substring.

Together with 125166721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125166779) 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 as a sum of consecutive naturals, namely, 62583359 + 62583360.

It is an arithmetic number, because the mean of its divisors is an integer number (62583360).

Almost surely, 2^125166719 is an apocalyptic number.

125166719 is a deficient number, since it is larger than the sum of its proper divisors (1).

125166719 is an equidigital number, since it uses as much as digits as its factorization.

125166719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 125166719 is about 11187.7933034178. The cubic root of 125166719 is about 500.2221932457. Note that the first 3 decimals are identical.

The spelling of 125166719 in words is "one hundred twenty-five million, one hundred sixty-six thousand, seven hundred nineteen".