5143986 has 40 divisors (see below), whose sum is σ = 11669724. Its totient is φ = 1693440.

The previous prime is 5143967. The next prime is 5143987. The reversal of 5143986 is 6893415.

It can be written as a sum of positive squares in 2 ways, for example, as 4862025 + 281961 = 2205^2 + 531^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 5⁷ + 1 + 4⁴ + 3⁷ + 9⁷ + 8³ + 6⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 5143986.

It is not an unprimeable number, because it can be changed into a prime (5143987) 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, 18166 + ... + 18446.

Almost surely, 2^5143986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5143986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5834862).

5143986 is an abundant number, since it is smaller than the sum of its proper divisors (6525738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5143986 is a wasteful number, since it uses less digits than its factorization.

5143986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 399 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 5143986 is about 2268.0357140045. The cubic root of 5143986 is about 172.6235032378.

The spelling of 5143986 in words is "five million, one hundred forty-three thousand, nine hundred eighty-six".