5642881 has 4 divisors (see below), whose sum is σ = 5692932. Its totient is φ = 5592832.

The previous prime is 5642873. The next prime is 5642909. The reversal of 5642881 is 1882465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 512656 + 5130225 = 716^2 + 2265^2 .

It is a cyclic number.

It is not a de Polignac number, because 5642881 - 2³ = 5642873 is a prime.

It is a super-2 number, since 2×5642881² = 63684211960322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5642801) 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, 24856 + ... + 25081.

It is an arithmetic number, because the mean of its divisors is an integer number (1423233).

Almost surely, 2^5642881 is an apocalyptic number.

It is an amenable number.

5642881 is a deficient number, since it is larger than the sum of its proper divisors (50051).

5642881 is a wasteful number, since it uses less digits than its factorization.

5642881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50050.

The product of its digits is 15360, while the sum is 34.

The square root of 5642881 is about 2375.4748998884. The cubic root of 5642881 is about 178.0329127373.

It can be divided in two parts, 56 and 42881, that multiplied together give a triangular number (2401336 = T₂₁₉₁).

The spelling of 5642881 in words is "five million, six hundred forty-two thousand, eight hundred eighty-one".