5900021 has 4 divisors (see below), whose sum is σ = 6103500. Its totient is φ = 5696544.

The previous prime is 5899997. The next prime is 5900047. The reversal of 5900021 is 1200095.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1999396 + 3900625 = 1414^2 + 1975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5900021 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 (5902021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101696 + ... + 101753.

It is an arithmetic number, because the mean of its divisors is an integer number (1525875).

Almost surely, 2^5900021 is an apocalyptic number.

It is an amenable number.

5900021 is a deficient number, since it is larger than the sum of its proper divisors (203479).

5900021 is a wasteful number, since it uses less digits than its factorization.

5900021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203478.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 5900021 is about 2428.9958830760. The cubic root of 5900021 is about 180.6971013180.

The spelling of 5900021 in words is "five million, nine hundred thousand, twenty-one".