4521916 has 18 divisors (see below), whose sum is σ = 9205728. Its totient is φ = 1937880.

The previous prime is 4521899. The next prime is 4521929. The reversal of 4521916 is 6191254.

It is a super-2 number, since 2×4521916² = 40895448622112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11340 + ... + 11731.

Almost surely, 2^4521916 is an apocalyptic number.

It is an amenable number.

4521916 is an abundant number, since it is smaller than the sum of its proper divisors (4683812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4521916 is a wasteful number, since it uses less digits than its factorization.

4521916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23089 (or 23080 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 4521916 is about 2126.4797201008. The cubic root of 4521916 is about 165.3639471724.

The spelling of 4521916 in words is "four million, five hundred twenty-one thousand, nine hundred sixteen".