135125857 has 2 divisors, whose sum is σ = 135125858. Its totient is φ = 135125856.

The previous prime is 135125833. The next prime is 135125923. The reversal of 135125857 is 758521531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131882256 + 3243601 = 11484^2 + 1801^2 .

It is a cyclic number.

It is not a de Polignac number, because 135125857 - 2⁷ = 135125729 is a prime.

It is not a weakly prime, because it can be changed into another prime (135125357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67562928 + 67562929.

It is an arithmetic number, because the mean of its divisors is an integer number (67562929).

Almost surely, 2^135125857 is an apocalyptic number.

It is an amenable number.

135125857 is a deficient number, since it is larger than the sum of its proper divisors (1).

135125857 is an equidigital number, since it uses as much as digits as its factorization.

135125857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 37.

The square root of 135125857 is about 11624.3647998504. The cubic root of 135125857 is about 513.1521511129.

The spelling of 135125857 in words is "one hundred thirty-five million, one hundred twenty-five thousand, eight hundred fifty-seven".