4636421 has 4 divisors (see below), whose sum is σ = 4664352. Its totient is φ = 4608492.

The previous prime is 4636381. The next prime is 4636441. The reversal of 4636421 is 1246364.

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 4636421 - 2¹⁴ = 4620037 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 (4636441) 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, 13715 + ... + 14048.

It is an arithmetic number, because the mean of its divisors is an integer number (1166088).

Almost surely, 2^4636421 is an apocalyptic number.

It is an amenable number.

4636421 is a deficient number, since it is larger than the sum of its proper divisors (27931).

4636421 is a wasteful number, since it uses less digits than its factorization.

4636421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27930.

The product of its digits is 3456, while the sum is 26.

The square root of 4636421 is about 2153.2350080751. The cubic root of 4636421 is about 166.7481232935.

The spelling of 4636421 in words is "four million, six hundred thirty-six thousand, four hundred twenty-one".