125135557 has 2 divisors, whose sum is σ = 125135558. Its totient is φ = 125135556.

The previous prime is 125135497. The next prime is 125135579. The reversal of 125135557 is 755531521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95531076 + 29604481 = 9774^2 + 5441^2 .

It is a cyclic number.

It is not a de Polignac number, because 125135557 - 2⁷ = 125135429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125135357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62567778 + 62567779.

It is an arithmetic number, because the mean of its divisors is an integer number (62567779).

Almost surely, 2^125135557 is an apocalyptic number.

It is an amenable number.

125135557 is a deficient number, since it is larger than the sum of its proper divisors (1).

125135557 is an equidigital number, since it uses as much as digits as its factorization.

125135557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26250, while the sum is 34.

The square root of 125135557 is about 11186.4005381535. The cubic root of 125135557 is about 500.1806773702.

The spelling of 125135557 in words is "one hundred twenty-five million, one hundred thirty-five thousand, five hundred fifty-seven".