5187281 has 4 divisors (see below), whose sum is σ = 5658864. Its totient is φ = 4715700.

The previous prime is 5187277. The next prime is 5187283. The reversal of 5187281 is 1827815.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5187281 - 2² = 5187277 is a prime.

It is a super-2 number, since 2×5187281² = 53815768345922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5187283) 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, 235775 + ... + 235796.

It is an arithmetic number, because the mean of its divisors is an integer number (1414716).

Almost surely, 2^5187281 is an apocalyptic number.

It is an amenable number.

5187281 is a deficient number, since it is larger than the sum of its proper divisors (471583).

5187281 is a wasteful number, since it uses less digits than its factorization.

5187281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471582.

The product of its digits is 4480, while the sum is 32.

The square root of 5187281 is about 2277.5603175328. The cubic root of 5187281 is about 173.1064532430.

The spelling of 5187281 in words is "five million, one hundred eighty-seven thousand, two hundred eighty-one".