3726621 has 32 divisors (see below), whose sum is σ = 6117120. Its totient is φ = 2230272.

The previous prime is 3726599. The next prime is 3726623. The reversal of 3726621 is 1266273.

It is a happy number.

3726621 is a `hidden beast` number, since 37 + 2 + 6 + 621 = 666.

It is not a de Polignac number, because 3726621 - 2¹⁰ = 3725597 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3726623) 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 in 31 ways as a sum of consecutive naturals, for example, 10381 + ... + 10733.

It is an arithmetic number, because the mean of its divisors is an integer number (191160).

Almost surely, 2^3726621 is an apocalyptic number.

It is an amenable number.

3726621 is a deficient number, since it is larger than the sum of its proper divisors (2390499).

3726621 is a wasteful number, since it uses less digits than its factorization.

3726621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 396 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 3726621 is about 1930.4458034351. The cubic root of 3726621 is about 155.0380898412.

The spelling of 3726621 in words is "three million, seven hundred twenty-six thousand, six hundred twenty-one".