125665249 has 2 divisors, whose sum is σ = 125665250. Its totient is φ = 125665248.

The previous prime is 125665217. The next prime is 125665271. The reversal of 125665249 is 942566521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119574225 + 6091024 = 10935^2 + 2468^2 .

It is a cyclic number.

It is not a de Polignac number, because 125665249 - 2⁵ = 125665217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125665349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62832624 + 62832625.

It is an arithmetic number, because the mean of its divisors is an integer number (62832625).

Almost surely, 2^125665249 is an apocalyptic number.

It is an amenable number.

125665249 is a deficient number, since it is larger than the sum of its proper divisors (1).

125665249 is an equidigital number, since it uses as much as digits as its factorization.

125665249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 125665249 is about 11210.0512487678. The cubic root of 125665249 is about 500.8854297694.

The spelling of 125665249 in words is "one hundred twenty-five million, six hundred sixty-five thousand, two hundred forty-nine".