4523921 has 8 divisors (see below), whose sum is σ = 4881384. Its totient is φ = 4176640.

The previous prime is 4523917. The next prime is 4523941. The reversal of 4523921 is 1293254.

It can be written as a sum of positive squares in 4 ways, for example, as 2739025 + 1784896 = 1655^2 + 1336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4523921 - 2² = 4523917 is a prime.

It is a super-2 number, since 2×4523921² = 40931722428482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4523941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1610 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (610173).

Almost surely, 2^4523921 is an apocalyptic number.

It is an amenable number.

4523921 is a deficient number, since it is larger than the sum of its proper divisors (357463).

4523921 is a wasteful number, since it uses less digits than its factorization.

4523921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091.

The product of its digits is 2160, while the sum is 26.

The square root of 4523921 is about 2126.9511042805. The cubic root of 4523921 is about 165.3883841384.

The spelling of 4523921 in words is "four million, five hundred twenty-three thousand, nine hundred twenty-one".