3125999 has 4 divisors (see below), whose sum is σ = 3261936. Its totient is φ = 2990064.

The previous prime is 3125989. The next prime is 3126001. The reversal of 3125999 is 9995213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3125999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67934 + ... + 67979.

It is an arithmetic number, because the mean of its divisors is an integer number (815484).

Almost surely, 2^3125999 is an apocalyptic number.

3125999 is a deficient number, since it is larger than the sum of its proper divisors (135937).

3125999 is a wasteful number, since it uses less digits than its factorization.

3125999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135936.

The product of its digits is 21870, while the sum is 38.

The square root of 3125999 is about 1768.0494902576. The cubic root of 3125999 is about 146.2164644173.

The spelling of 3125999 in words is "three million, one hundred twenty-five thousand, nine hundred ninety-nine".