5807921 has 6 divisors (see below), whose sum is σ = 6756210. Its totient is φ = 4978176.

The previous prime is 5807903. The next prime is 5807929. The reversal of 5807921 is 1297085.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 790321 = 2240^2 + 889^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5807921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5807929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59216 + ... + 59313.

It is an arithmetic number, because the mean of its divisors is an integer number (1126035).

Almost surely, 2^5807921 is an apocalyptic number.

It is an amenable number.

5807921 is a deficient number, since it is larger than the sum of its proper divisors (948289).

5807921 is a wasteful number, since it uses less digits than its factorization.

5807921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118543 (or 118536 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 5807921 is about 2409.9628627844. The cubic root of 5807921 is about 179.7519319432.

The spelling of 5807921 in words is "five million, eight hundred seven thousand, nine hundred twenty-one".