125615279 has 2 divisors, whose sum is σ = 125615280. Its totient is φ = 125615278.

The previous prime is 125615249. The next prime is 125615297. The reversal of 125615279 is 972516521.

It is a happy number.

Together with next prime (125615297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125615279 - 2¹² = 125611183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125615249) 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, 62807639 + 62807640.

It is an arithmetic number, because the mean of its divisors is an integer number (62807640).

Almost surely, 2^125615279 is an apocalyptic number.

125615279 is a deficient number, since it is larger than the sum of its proper divisors (1).

125615279 is an equidigital number, since it uses as much as digits as its factorization.

125615279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 38.

The square root of 125615279 is about 11207.8222237864. The cubic root of 125615279 is about 500.8190296483.

The spelling of 125615279 in words is "one hundred twenty-five million, six hundred fifteen thousand, two hundred seventy-nine".