4628921 has 4 divisors (see below), whose sum is σ = 5049744. Its totient is φ = 4208100.

The previous prime is 4628917. The next prime is 4628929. The reversal of 4628921 is 1298264.

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 4628921 - 2² = 4628917 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4628929) 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, 210395 + ... + 210416.

It is an arithmetic number, because the mean of its divisors is an integer number (1262436).

Almost surely, 2^4628921 is an apocalyptic number.

It is an amenable number.

4628921 is a deficient number, since it is larger than the sum of its proper divisors (420823).

4628921 is a wasteful number, since it uses less digits than its factorization.

4628921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420822.

The product of its digits is 6912, while the sum is 32.

The square root of 4628921 is about 2151.4927376127. The cubic root of 4628921 is about 166.6581626772.

The spelling of 4628921 in words is "four million, six hundred twenty-eight thousand, nine hundred twenty-one".