5285781 has 12 divisors (see below), whose sum is σ = 8037120. Its totient is φ = 3338280.

The previous prime is 5285773. The next prime is 5285789. The reversal of 5285781 is 1875825.

5285781 is a `hidden beast` number, since 528 + 57 + 81 = 666.

5285781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (5285773) and next prime (5285789).

It is not a de Polignac number, because 5285781 - 2³ = 5285773 is a prime.

It is a super-2 number, since 2×5285781² = 55878961559922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5285789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15285 + ... + 15626.

It is an arithmetic number, because the mean of its divisors is an integer number (669760).

Almost surely, 2^5285781 is an apocalyptic number.

It is an amenable number.

5285781 is a deficient number, since it is larger than the sum of its proper divisors (2751339).

5285781 is a wasteful number, since it uses less digits than its factorization.

5285781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30936 (or 30933 counting only the distinct ones).

The product of its digits is 22400, while the sum is 36.

The square root of 5285781 is about 2299.0826431427. The cubic root of 5285781 is about 174.1952821379.

The spelling of 5285781 in words is "five million, two hundred eighty-five thousand, seven hundred eighty-one".