4564921 has 4 divisors (see below), whose sum is σ = 4805200. Its totient is φ = 4324644.

The previous prime is 4564907. The next prime is 4564927. The reversal of 4564921 is 1294654.

4564921 = T₁₇₄₃ + T₁₇₄₄ + T₁₇₄₅.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1294654 = 2 ⋅647327.

It is a cyclic number.

It is not a de Polignac number, because 4564921 - 2⁷ = 4564793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4564927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120111 + ... + 120148.

It is an arithmetic number, because the mean of its divisors is an integer number (1201300).

Almost surely, 2^4564921 is an apocalyptic number.

4564921 is the 1745-th centered triangular number.

It is an amenable number.

4564921 is a deficient number, since it is larger than the sum of its proper divisors (240279).

4564921 is a wasteful number, since it uses less digits than its factorization.

4564921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240278.

The product of its digits is 8640, while the sum is 31.

The square root of 4564921 is about 2136.5675744053. The cubic root of 4564921 is about 165.8865170081.

The spelling of 4564921 in words is "four million, five hundred sixty-four thousand, nine hundred twenty-one".