125512637 has 2 divisors, whose sum is σ = 125512638. Its totient is φ = 125512636.

The previous prime is 125512627. The next prime is 125512661. The reversal of 125512637 is 736215521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116337796 + 9174841 = 10786^2 + 3029^2 .

It is an emirp because it is prime and its reverse (736215521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125512637 - 2⁶ = 125512573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125512627) 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, 62756318 + 62756319.

It is an arithmetic number, because the mean of its divisors is an integer number (62756319).

Almost surely, 2^125512637 is an apocalyptic number.

It is an amenable number.

125512637 is a deficient number, since it is larger than the sum of its proper divisors (1).

125512637 is an equidigital number, since it uses as much as digits as its factorization.

125512637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 125512637 is about 11203.2422539192. The cubic root of 125512637 is about 500.6825837349.

The spelling of 125512637 in words is "one hundred twenty-five million, five hundred twelve thousand, six hundred thirty-seven".