3950621 has 4 divisors (see below), whose sum is σ = 3995100. Its totient is φ = 3906144.

The previous prime is 3950603. The next prime is 3950627. The reversal of 3950621 is 1260593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1260593 = 19 ⋅66347.

It can be written as a sum of positive squares in 2 ways, for example, as 2544025 + 1406596 = 1595^2 + 1186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3950621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3950627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22106 + ... + 22283.

It is an arithmetic number, because the mean of its divisors is an integer number (998775).

Almost surely, 2^3950621 is an apocalyptic number.

It is an amenable number.

3950621 is a deficient number, since it is larger than the sum of its proper divisors (44479).

3950621 is an equidigital number, since it uses as much as digits as its factorization.

3950621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44478.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3950621 is about 1987.6169148002. The cubic root of 3950621 is about 158.0841964322.

The spelling of 3950621 in words is "three million, nine hundred fifty thousand, six hundred twenty-one".