3785621 has 4 divisors (see below), whose sum is σ = 4326432. Its totient is φ = 3244812.

The previous prime is 3785569. The next prime is 3785623. The reversal of 3785621 is 1265873.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3785621 - 2¹⁴ = 3769237 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 (3785623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270395 + ... + 270408.

It is an arithmetic number, because the mean of its divisors is an integer number (1081608).

Almost surely, 2^3785621 is an apocalyptic number.

It is an amenable number.

3785621 is a deficient number, since it is larger than the sum of its proper divisors (540811).

3785621 is an equidigital number, since it uses as much as digits as its factorization.

3785621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540810.

The product of its digits is 10080, while the sum is 32.

The square root of 3785621 is about 1945.6672377362. The cubic root of 3785621 is about 155.8519991240.

It can be divided in two parts, 37 and 85621, that added together give a palindrome (85658).

The spelling of 3785621 in words is "three million, seven hundred eighty-five thousand, six hundred twenty-one".