3161725 has 36 divisors (see below), whose sum is σ = 4770900. Its totient is φ = 2069760.

The previous prime is 3161707. The next prime is 3161749. The reversal of 3161725 is 5271613.

It can be written as a sum of positive squares in 6 ways, for example, as 268324 + 2893401 = 518^2 + 1701^2 .

It is not a de Polignac number, because 3161725 - 2⁵ = 3161693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 3161725.

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 35 ways as a sum of consecutive naturals, for example, 35481 + ... + 35569.

It is an arithmetic number, because the mean of its divisors is an integer number (132525).

Almost surely, 2^3161725 is an apocalyptic number.

3161725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3161725 is a deficient number, since it is larger than the sum of its proper divisors (1609175).

3161725 is a wasteful number, since it uses less digits than its factorization.

3161725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 130 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 3161725 is about 1778.1240114233. The cubic root of 3161725 is about 146.7713755265.

The spelling of 3161725 in words is "three million, one hundred sixty-one thousand, seven hundred twenty-five".