125902709 has 2 divisors, whose sum is σ = 125902710. Its totient is φ = 125902708.

The previous prime is 125902681. The next prime is 125902781. The reversal of 125902709 is 907209521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84235684 + 41667025 = 9178^2 + 6455^2 .

It is a cyclic number.

It is not a de Polignac number, because 125902709 - 2¹² = 125898613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125901709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62951354 + 62951355.

It is an arithmetic number, because the mean of its divisors is an integer number (62951355).

Almost surely, 2^125902709 is an apocalyptic number.

It is an amenable number.

125902709 is a deficient number, since it is larger than the sum of its proper divisors (1).

125902709 is an equidigital number, since it uses as much as digits as its factorization.

125902709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 125902709 is about 11220.6376378529. The cubic root of 125902709 is about 501.2007262050.

The spelling of 125902709 in words is "one hundred twenty-five million, nine hundred two thousand, seven hundred nine".