5642891 has 4 divisors (see below), whose sum is σ = 5714400. Its totient is φ = 5571384.

The previous prime is 5642873. The next prime is 5642909. The reversal of 5642891 is 1982465.

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

It is an interprime number because it is at equal distance from previous prime (5642873) and next prime (5642909).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5642891 is a prime.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35636 + ... + 35793.

It is an arithmetic number, because the mean of its divisors is an integer number (1428600).

Almost surely, 2^5642891 is an apocalyptic number.

5642891 is a deficient number, since it is larger than the sum of its proper divisors (71509).

5642891 is an equidigital number, since it uses as much as digits as its factorization.

5642891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71508.

The product of its digits is 17280, while the sum is 35.

The square root of 5642891 is about 2375.4770047298. The cubic root of 5642891 is about 178.0330179040.

The spelling of 5642891 in words is "five million, six hundred forty-two thousand, eight hundred ninety-one".