3951685 has 8 divisors (see below), whose sum is σ = 4905720. Its totient is φ = 3052224.

The previous prime is 3951611. The next prime is 3951707. The reversal of 3951685 is 5861593.

3951685 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 3508129 = 666^2 + 1873^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3951685 - 2⁷ = 3951557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13482 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (613215).

Almost surely, 2^3951685 is an apocalyptic number.

It is an amenable number.

3951685 is a deficient number, since it is larger than the sum of its proper divisors (954035).

3951685 is a wasteful number, since it uses less digits than its factorization.

3951685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27287.

The product of its digits is 32400, while the sum is 37.

The square root of 3951685 is about 1987.8845539920. The cubic root of 3951685 is about 158.0983871537.

It can be divided in two parts, 39516 and 85, that added together give a square (39601 = 199²).

The spelling of 3951685 in words is "three million, nine hundred fifty-one thousand, six hundred eighty-five".