5259781 has 4 divisors (see below), whose sum is σ = 5300064. Its totient is φ = 5219500.

The previous prime is 5259763. The next prime is 5259823. The reversal of 5259781 is 1879525.

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 a cyclic number.

It is not a de Polignac number, because 5259781 - 2⁹ = 5259269 is a prime.

It is a super-2 number, since 2×5259781² = 55330592335922, which contains 22 as substring.

It is a Duffinian number.

5259781 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5259781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5259721) 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, 19945 + ... + 20206.

It is an arithmetic number, because the mean of its divisors is an integer number (1325016).

Almost surely, 2^5259781 is an apocalyptic number.

It is an amenable number.

5259781 is a deficient number, since it is larger than the sum of its proper divisors (40283).

5259781 is a wasteful number, since it uses less digits than its factorization.

5259781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40282.

The product of its digits is 25200, while the sum is 37.

The square root of 5259781 is about 2293.4212434701. The cubic root of 5259781 is about 173.9091986713.

The spelling of 5259781 in words is "five million, two hundred fifty-nine thousand, seven hundred eighty-one".