4572421 has 4 divisors (see below), whose sum is σ = 5225632. Its totient is φ = 3919212.

The previous prime is 4572391. The next prime is 4572427. The reversal of 4572421 is 1242754.

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 4572421 - 2¹⁵ = 4539653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4572427) 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, 326595 + ... + 326608.

It is an arithmetic number, because the mean of its divisors is an integer number (1306408).

Almost surely, 2^4572421 is an apocalyptic number.

It is an amenable number.

4572421 is a deficient number, since it is larger than the sum of its proper divisors (653211).

4572421 is an equidigital number, since it uses as much as digits as its factorization.

4572421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653210.

The product of its digits is 2240, while the sum is 25.

The square root of 4572421 is about 2138.3220056858. The cubic root of 4572421 is about 165.9773158145.

The spelling of 4572421 in words is "four million, five hundred seventy-two thousand, four hundred twenty-one".