5715981 has 16 divisors (see below), whose sum is σ = 8510400. Its totient is φ = 3791664.

The previous prime is 5715949. The next prime is 5715989. The reversal of 5715981 is 1895175.

5715981 is a `hidden beast` number, since 571 + 5 + 9 + 81 = 666.

It is not a de Polignac number, because 5715981 - 2⁵ = 5715949 is a prime.

It is a super-2 number, since 2×5715981² = 65344877584722, which contains 22 as substring.

5715981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5715989) 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 15 ways as a sum of consecutive naturals, for example, 6870 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (531900).

Almost surely, 2^5715981 is an apocalyptic number.

It is an amenable number.

5715981 is a deficient number, since it is larger than the sum of its proper divisors (2794419).

5715981 is a wasteful number, since it uses less digits than its factorization.

5715981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1059 counting only the distinct ones).

The product of its digits is 12600, while the sum is 36.

The square root of 5715981 is about 2390.8117868205. The cubic root of 5715981 is about 178.7983851933.

The spelling of 5715981 in words is "five million, seven hundred fifteen thousand, nine hundred eighty-one".