3735621 has 6 divisors (see below), whose sum is σ = 5395910. Its totient is φ = 2490408.

The previous prime is 3735619. The next prime is 3735649. The reversal of 3735621 is 1265373.

It is a happy number.

3735621 is a `hidden beast` number, since 3 + 7 + 35 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2842596 + 893025 = 1686^2 + 945^2 .

It is not a de Polignac number, because 3735621 - 2¹ = 3735619 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 (3735601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207526 + ... + 207543.

Almost surely, 2^3735621 is an apocalyptic number.

It is an amenable number.

3735621 is a deficient number, since it is larger than the sum of its proper divisors (1660289).

3735621 is a wasteful number, since it uses less digits than its factorization.

3735621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415075 (or 415072 counting only the distinct ones).

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

The square root of 3735621 is about 1932.7754654900. The cubic root of 3735621 is about 155.1627980810.

It can be divided in two parts, 3735 and 621, that added together give a square (4356 = 66²).

The spelling of 3735621 in words is "three million, seven hundred thirty-five thousand, six hundred twenty-one".