3637421 has 4 divisors (see below), whose sum is σ = 3643200. Its totient is φ = 3631644.

The previous prime is 3637411. The next prime is 3637453. The reversal of 3637421 is 1247363.

3637421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-3637421 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 (3637411) 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 3 ways as a sum of consecutive naturals, for example, 1811 + ... + 3248.

It is an arithmetic number, because the mean of its divisors is an integer number (910800).

Almost surely, 2^3637421 is an apocalyptic number.

It is an amenable number.

3637421 is a deficient number, since it is larger than the sum of its proper divisors (5779).

3637421 is an equidigital number, since it uses as much as digits as its factorization.

3637421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5778.

The product of its digits is 3024, while the sum is 26.

The square root of 3637421 is about 1907.2024014247. The cubic root of 3637421 is about 153.7910952787.

The spelling of 3637421 in words is "three million, six hundred thirty-seven thousand, four hundred twenty-one".