125764649 has 2 divisors, whose sum is σ = 125764650. Its totient is φ = 125764648.

The previous prime is 125764633. The next prime is 125764663. The reversal of 125764649 is 946467521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114340249 + 11424400 = 10693^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 125764649 - 2⁴ = 125764633 is a prime.

It is not a weakly prime, because it can be changed into another prime (125764609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62882324 + 62882325.

It is an arithmetic number, because the mean of its divisors is an integer number (62882325).

Almost surely, 2^125764649 is an apocalyptic number.

It is an amenable number.

125764649 is a deficient number, since it is larger than the sum of its proper divisors (1).

125764649 is an equidigital number, since it uses as much as digits as its factorization.

125764649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 125764649 is about 11214.4838936083. The cubic root of 125764649 is about 501.0174601453.

The spelling of 125764649 in words is "one hundred twenty-five million, seven hundred sixty-four thousand, six hundred forty-nine".