5187581 has 12 divisors (see below), whose sum is σ = 6298272. Its totient is φ = 4252248.

The previous prime is 5187577. The next prime is 5187593. The reversal of 5187581 is 1857815.

5187581 = 110² + 111² + ... + 256².

It is not a de Polignac number, because 5187581 - 2² = 5187577 is a prime.

It is a super-2 number, since 2×5187581² = 53821993263122, which contains 22 as substring.

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 (5187181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1175 + ... + 3428.

It is an arithmetic number, because the mean of its divisors is an integer number (524856).

Almost surely, 2^5187581 is an apocalyptic number.

It is an amenable number.

5187581 is a deficient number, since it is larger than the sum of its proper divisors (1110691).

5187581 is a wasteful number, since it uses less digits than its factorization.

5187581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640 (or 4633 counting only the distinct ones).

The product of its digits is 11200, while the sum is 35.

The square root of 5187581 is about 2277.6261765268. The cubic root of 5187581 is about 173.1097903115.

The spelling of 5187581 in words is "five million, one hundred eighty-seven thousand, five hundred eighty-one".