125744309 has 2 divisors, whose sum is σ = 125744310. Its totient is φ = 125744308.

The previous prime is 125744287. The next prime is 125744321. The reversal of 125744309 is 903447521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116165284 + 9579025 = 10778^2 + 3095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125744309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125744809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62872154 + 62872155.

It is an arithmetic number, because the mean of its divisors is an integer number (62872155).

Almost surely, 2^125744309 is an apocalyptic number.

It is an amenable number.

125744309 is a deficient number, since it is larger than the sum of its proper divisors (1).

125744309 is an equidigital number, since it uses as much as digits as its factorization.

125744309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 125744309 is about 11213.5769939837. The cubic root of 125744309 is about 500.9904487271.

The spelling of 125744309 in words is "one hundred twenty-five million, seven hundred forty-four thousand, three hundred nine".