125631859 has 2 divisors, whose sum is σ = 125631860. Its totient is φ = 125631858.

The previous prime is 125631823. The next prime is 125631959. The reversal of 125631859 is 958136521.

It is a weak prime.

It is an emirp because it is prime and its reverse (958136521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125631859 - 2¹¹ = 125629811 is a prime.

It is not a weakly prime, because it can be changed into another prime (125631559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62815929 + 62815930.

It is an arithmetic number, because the mean of its divisors is an integer number (62815930).

Almost surely, 2^125631859 is an apocalyptic number.

125631859 is a deficient number, since it is larger than the sum of its proper divisors (1).

125631859 is an equidigital number, since it uses as much as digits as its factorization.

125631859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 125631859 is about 11208.5618613629. The cubic root of 125631859 is about 500.8410630991.

The spelling of 125631859 in words is "one hundred twenty-five million, six hundred thirty-one thousand, eight hundred fifty-nine".