125788513 has 2 divisors, whose sum is σ = 125788514. Its totient is φ = 125788512.

The previous prime is 125788511. The next prime is 125788517. The reversal of 125788513 is 315887521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99860049 + 25928464 = 9993^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 125788513 - 2¹ = 125788511 is a prime.

Together with 125788511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (125788511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62894256 + 62894257.

It is an arithmetic number, because the mean of its divisors is an integer number (62894257).

Almost surely, 2^125788513 is an apocalyptic number.

It is an amenable number.

125788513 is a deficient number, since it is larger than the sum of its proper divisors (1).

125788513 is an equidigital number, since it uses as much as digits as its factorization.

125788513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 40.

The square root of 125788513 is about 11215.5478243374. The cubic root of 125788513 is about 501.0491477051.

The spelling of 125788513 in words is "one hundred twenty-five million, seven hundred eighty-eight thousand, five hundred thirteen".