4581621 has 12 divisors (see below), whose sum is σ = 7219680. Its totient is φ = 2776680.

The previous prime is 4581617. The next prime is 4581637. The reversal of 4581621 is 1261854.

It is not a de Polignac number, because 4581621 - 2² = 4581617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4581611) 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 11 ways as a sum of consecutive naturals, for example, 23041 + ... + 23238.

It is an arithmetic number, because the mean of its divisors is an integer number (601640).

Almost surely, 2^4581621 is an apocalyptic number.

It is an amenable number.

4581621 is a deficient number, since it is larger than the sum of its proper divisors (2638059).

4581621 is a wasteful number, since it uses less digits than its factorization.

4581621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46296 (or 46293 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 4581621 is about 2140.4721441775. The cubic root of 4581621 is about 166.0885601870.

The spelling of 4581621 in words is "four million, five hundred eighty-one thousand, six hundred twenty-one".