125503613 has 2 divisors, whose sum is σ = 125503614. Its totient is φ = 125503612.

The previous prime is 125503603. The next prime is 125503649. The reversal of 125503613 is 316305521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125037124 + 466489 = 11182^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 125503613 - 2⁴ = 125503597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125503603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62751806 + 62751807.

It is an arithmetic number, because the mean of its divisors is an integer number (62751807).

Almost surely, 2^125503613 is an apocalyptic number.

It is an amenable number.

125503613 is a deficient number, since it is larger than the sum of its proper divisors (1).

125503613 is an equidigital number, since it uses as much as digits as its factorization.

125503613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 125503613 is about 11202.8395061252. The cubic root of 125503613 is about 500.6705842315.

The spelling of 125503613 in words is "one hundred twenty-five million, five hundred three thousand, six hundred thirteen".