4521939 has 8 divisors (see below), whose sum is σ = 6223872. Its totient is φ = 2917320.

The previous prime is 4521929. The next prime is 4521971. The reversal of 4521939 is 9391254.

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

It is not a de Polignac number, because 4521939 - 2⁹ = 4521427 is a prime.

4521939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4521929) 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, 24219 + ... + 24404.

It is an arithmetic number, because the mean of its divisors is an integer number (777984).

Almost surely, 2^4521939 is an apocalyptic number.

4521939 is a deficient number, since it is larger than the sum of its proper divisors (1701933).

4521939 is a wasteful number, since it uses less digits than its factorization.

4521939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48657.

The product of its digits is 9720, while the sum is 33.

The square root of 4521939 is about 2126.4851280928. The cubic root of 4521939 is about 165.3642275377.

It can be divided in two parts, 4521 and 939, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 4521939 in words is "four million, five hundred twenty-one thousand, nine hundred thirty-nine".