4686421 has 4 divisors (see below), whose sum is σ = 4705344. Its totient is φ = 4667500.

The previous prime is 4686389. The next prime is 4686431. The reversal of 4686421 is 1246864.

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 4686421 - 2⁵ = 4686389 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4686431) 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, 9085 + ... + 9586.

It is an arithmetic number, because the mean of its divisors is an integer number (1176336).

Almost surely, 2^4686421 is an apocalyptic number.

It is an amenable number.

4686421 is a deficient number, since it is larger than the sum of its proper divisors (18923).

4686421 is a wasteful number, since it uses less digits than its factorization.

4686421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18922.

The product of its digits is 9216, while the sum is 31.

The square root of 4686421 is about 2164.8143107435. The cubic root of 4686421 is about 167.3453953235.

It can be divided in two parts, 468 and 6421, that added together give a square (6889 = 83²).

The spelling of 4686421 in words is "four million, six hundred eighty-six thousand, four hundred twenty-one".