3742621 has 2 divisors, whose sum is σ = 3742622. Its totient is φ = 3742620.

The previous prime is 3742579. The next prime is 3742631. The reversal of 3742621 is 1262473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 662596 = 1755^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 3742621 - 2⁷ = 3742493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3742631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1871310 + 1871311.

It is an arithmetic number, because the mean of its divisors is an integer number (1871311).

Almost surely, 2^3742621 is an apocalyptic number.

It is an amenable number.

3742621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3742621 is an equidigital number, since it uses as much as digits as its factorization.

3742621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 3742621 is about 1934.5854853172. The cubic root of 3742621 is about 155.2596549687.

The spelling of 3742621 in words is "three million, seven hundred forty-two thousand, six hundred twenty-one".