5865874921 has 27 divisors (see below), whose sum is σ = 6458152311. Its totient is φ = 5326918128.

The previous prime is 5865874877. The next prime is 5865874999. The reversal of 5865874921 is 1294785685.

It is a happy number.

The square root of 5865874921 is 76589.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3075922521 + 2789952400 = 55461^2 + 52820^2 .

It is not a de Polignac number, because 5865874921 - 2²¹ = 5863777769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5865872921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 42200470 + ... + 42200608.

Almost surely, 2^5865874921 is an apocalyptic number.

5865874921 is the 76589-th square number.

5865874921 is the 38295-th centered octagonal number.

It is an amenable number.

5865874921 is a deficient number, since it is larger than the sum of its proper divisors (592277390).

5865874921 is an equidigital number, since it uses as much as digits as its factorization.

5865874921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 187 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 55.

The cubic root of 5865874921 is about 1803.4783482326.

The spelling of 5865874921 in words is "five billion, eight hundred sixty-five million, eight hundred seventy-four thousand, nine hundred twenty-one".