3921685 has 8 divisors (see below), whose sum is σ = 4772736. Its totient is φ = 3092880.

The previous prime is 3921683. The next prime is 3921689. The reversal of 3921685 is 5861293.

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

It is not a de Polignac number, because 3921685 - 2¹ = 3921683 is a prime.

It is a super-2 number, since 2×3921685² = 30759226478450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3921685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5169 + ... + 5878.

It is an arithmetic number, because the mean of its divisors is an integer number (596592).

Almost surely, 2^3921685 is an apocalyptic number.

It is an amenable number.

3921685 is a deficient number, since it is larger than the sum of its proper divisors (851051).

3921685 is a wasteful number, since it uses less digits than its factorization.

3921685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123.

The product of its digits is 12960, while the sum is 34.

The square root of 3921685 is about 1980.3244683637. The cubic root of 3921685 is about 157.6972920220.

The spelling of 3921685 in words is "three million, nine hundred twenty-one thousand, six hundred eighty-five".