3138725 has 12 divisors (see below), whose sum is σ = 3916416. Its totient is φ = 2495280.

The previous prime is 3138691. The next prime is 3138767. The reversal of 3138725 is 5278313.

It is not a de Polignac number, because 3138725 - 2⁶ = 3138661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5294 + ... + 5856.

It is an arithmetic number, because the mean of its divisors is an integer number (326368).

Almost surely, 2^3138725 is an apocalyptic number.

It is an amenable number.

3138725 is a deficient number, since it is larger than the sum of its proper divisors (777691).

3138725 is a wasteful number, since it uses less digits than its factorization.

3138725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 791 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 3138725 is about 1771.6447160760. The cubic root of 3138725 is about 146.4146124197.

It can be divided in two parts, 31 and 38725, that multiplied together give a triangular number (1200475 = T₁₅₄₉).

The spelling of 3138725 in words is "three million, one hundred thirty-eight thousand, seven hundred twenty-five".