5218749 has 20 divisors (see below), whose sum is σ = 8208640. Its totient is φ = 3295080.

The previous prime is 5218729. The next prime is 5218793. The reversal of 5218749 is 9478125.

It is not a de Polignac number, because 5218749 - 2¹⁵ = 5185981 is a prime.

It is a super-2 number, since 2×5218749² = 54470682250002, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218729) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 157 + ... + 3234.

It is an arithmetic number, because the mean of its divisors is an integer number (410432).

Almost surely, 2^5218749 is an apocalyptic number.

It is an amenable number.

5218749 is a deficient number, since it is larger than the sum of its proper divisors (2989891).

5218749 is a wasteful number, since it uses less digits than its factorization.

5218749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422 (or 3413 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 5218749 is about 2284.4581414419. The cubic root of 5218749 is about 173.4557907664.

The spelling of 5218749 in words is "five million, two hundred eighteen thousand, seven hundred forty-nine".