4521813 has 8 divisors (see below), whose sum is σ = 6383808. Its totient is φ = 2837184.

The previous prime is 4521799. The next prime is 4521817. The reversal of 4521813 is 3181254.

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

It is not a de Polignac number, because 4521813 - 2⁸ = 4521557 is a prime.

4521813 is a lucky number.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521817) 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, 44281 + ... + 44382.

It is an arithmetic number, because the mean of its divisors is an integer number (797976).

Almost surely, 2^4521813 is an apocalyptic number.

It is an amenable number.

4521813 is a deficient number, since it is larger than the sum of its proper divisors (1861995).

4521813 is a wasteful number, since it uses less digits than its factorization.

4521813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88683.

The product of its digits is 960, while the sum is 24.

The square root of 4521813 is about 2126.4555015330. The cubic root of 4521813 is about 165.3626916120.

The spelling of 4521813 in words is "four million, five hundred twenty-one thousand, eight hundred thirteen".