3718021 has 2 divisors, whose sum is σ = 3718022. Its totient is φ = 3718020.

The previous prime is 3717979. The next prime is 3718027. The reversal of 3718021 is 1208173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2604996 + 1113025 = 1614^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3718021 - 2⁷ = 3717893 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3717983 and 3718001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3718027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1859010 + 1859011.

It is an arithmetic number, because the mean of its divisors is an integer number (1859011).

Almost surely, 2^3718021 is an apocalyptic number.

It is an amenable number.

3718021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3718021 is an equidigital number, since it uses as much as digits as its factorization.

3718021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 3718021 is about 1928.2170520976. The cubic root of 3718021 is about 154.9187364521.

The spelling of 3718021 in words is "three million, seven hundred eighteen thousand, twenty-one".