4623921 has 6 divisors (see below), whose sum is σ = 6679010. Its totient is φ = 3082608.

The previous prime is 4623911. The next prime is 4623953. The reversal of 4623921 is 1293264.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 2143296 = 1575^2 + 1464^2 .

It is not a de Polignac number, because 4623921 - 2⁷ = 4623793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4623911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256876 + ... + 256893.

Almost surely, 2^4623921 is an apocalyptic number.

It is an amenable number.

4623921 is a deficient number, since it is larger than the sum of its proper divisors (2055089).

4623921 is a wasteful number, since it uses less digits than its factorization.

4623921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513775 (or 513772 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 4623921 is about 2150.3304397232. The cubic root of 4623921 is about 166.5981349354.

The spelling of 4623921 in words is "four million, six hundred twenty-three thousand, nine hundred twenty-one".