5281591 has 4 divisors (see below), whose sum is σ = 6036112. Its totient is φ = 4527072.

The previous prime is 5281547. The next prime is 5281597. The reversal of 5281591 is 1951825.

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

It is a cyclic number.

It is not a de Polignac number, because 5281591 - 2¹¹ = 5279543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5281597) 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, 377250 + ... + 377263.

It is an arithmetic number, because the mean of its divisors is an integer number (1509028).

Almost surely, 2^5281591 is an apocalyptic number.

5281591 is a deficient number, since it is larger than the sum of its proper divisors (754521).

5281591 is an equidigital number, since it uses as much as digits as its factorization.

5281591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754520.

The product of its digits is 3600, while the sum is 31.

The square root of 5281591 is about 2298.1712294779. The cubic root of 5281591 is about 174.1492421946.

It can be divided in two parts, 528 and 1591, that multiplied together give a palindrome (840048).

The spelling of 5281591 in words is "five million, two hundred eighty-one thousand, five hundred ninety-one".