3954221 has 2 divisors, whose sum is σ = 3954222. Its totient is φ = 3954220.

The previous prime is 3954211. The next prime is 3954233. The reversal of 3954221 is 1224593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2656900 + 1297321 = 1630^2 + 1139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3954221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3954211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1977110 + 1977111.

It is an arithmetic number, because the mean of its divisors is an integer number (1977111).

Almost surely, 2^3954221 is an apocalyptic number.

It is an amenable number.

3954221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3954221 is an equidigital number, since it uses as much as digits as its factorization.

3954221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 3954221 is about 1988.5223156907. The cubic root of 3954221 is about 158.1321998836.

The spelling of 3954221 in words is "three million, nine hundred fifty-four thousand, two hundred twenty-one".