3722621 has 8 divisors (see below), whose sum is σ = 4266624. Its totient is φ = 3181680.

The previous prime is 3722617. The next prime is 3722623. The reversal of 3722621 is 1262273.

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 3722621 - 2² = 3722617 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 (3722623) 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, 3296 + ... + 4278.

It is an arithmetic number, because the mean of its divisors is an integer number (533328).

Almost surely, 2^3722621 is an apocalyptic number.

It is an amenable number.

3722621 is a deficient number, since it is larger than the sum of its proper divisors (544003).

3722621 is an equidigital number, since it uses as much as digits as its factorization.

3722621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531.

The product of its digits is 1008, while the sum is 23.

The square root of 3722621 is about 1929.4094951565. The cubic root of 3722621 is about 154.9825995035.

Adding to 3722621 its reverse (1262273), we get a palindrome (4984894).

The spelling of 3722621 in words is "three million, seven hundred twenty-two thousand, six hundred twenty-one".