3125709 has 24 divisors (see below), whose sum is σ = 4935840. Its totient is φ = 1971216.

The previous prime is 3125669. The next prime is 3125711. The reversal of 3125709 is 9075213.

It is not a de Polignac number, because 3125709 - 2¹⁷ = 2994637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4279 + ... + 4955.

It is an arithmetic number, because the mean of its divisors is an integer number (205660).

Almost surely, 2^3125709 is an apocalyptic number.

It is an amenable number.

3125709 is a deficient number, since it is larger than the sum of its proper divisors (1810131).

3125709 is an equidigital number, since it uses as much as digits as its factorization.

3125709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 3125709 is about 1767.9674770764. The cubic root of 3125709 is about 146.2119427603.

The spelling of 3125709 in words is "three million, one hundred twenty-five thousand, seven hundred nine".