3964621 has 8 divisors (see below), whose sum is σ = 4333824. Its totient is φ = 3610560.

The previous prime is 3964613. The next prime is 3964627. The reversal of 3964621 is 1264693.

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 3964621 - 2³ = 3964613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3964627) 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, 3235 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (541728).

Almost surely, 2^3964621 is an apocalyptic number.

3964621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3964621 is a deficient number, since it is larger than the sum of its proper divisors (369203).

3964621 is a wasteful number, since it uses less digits than its factorization.

3964621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7571.

The product of its digits is 7776, while the sum is 31.

The square root of 3964621 is about 1991.1356056281. The cubic root of 3964621 is about 158.2707130642.

The spelling of 3964621 in words is "three million, nine hundred sixty-four thousand, six hundred twenty-one".