3721635 has 24 divisors (see below), whose sum is σ = 6499584. Its totient is φ = 1969920.

The previous prime is 3721631. The next prime is 3721673. The reversal of 3721635 is 5361273.

It is a happy number.

3721635 is a `hidden beast` number, since 3 + 7 + 21 + 635 = 666.

3721635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3721635 - 2² = 3721631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3721599 and 3721608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8379 + ... + 8811.

It is an arithmetic number, because the mean of its divisors is an integer number (270816).

Almost surely, 2^3721635 is an apocalyptic number.

3721635 is a deficient number, since it is larger than the sum of its proper divisors (2777949).

3721635 is a wasteful number, since it uses less digits than its factorization.

3721635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 632 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 3721635 is about 1929.1539596414. The cubic root of 3721635 is about 154.9689150290.

It can be divided in two parts, 3721 and 635, that added together give a square (4356 = 66²).

The spelling of 3721635 in words is "three million, seven hundred twenty-one thousand, six hundred thirty-five".