6478591 has 4 divisors (see below), whose sum is σ = 7404112. Its totient is φ = 5553072.

The previous prime is 6478583. The next prime is 6478603. The reversal of 6478591 is 1958746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1958746 = 2 ⋅979373.

It is not a de Polignac number, because 6478591 - 2³ = 6478583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478501) 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, 462750 + ... + 462763.

It is an arithmetic number, because the mean of its divisors is an integer number (1851028).

Almost surely, 2^6478591 is an apocalyptic number.

6478591 is a deficient number, since it is larger than the sum of its proper divisors (925521).

6478591 is an equidigital number, since it uses as much as digits as its factorization.

6478591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925520.

The product of its digits is 60480, while the sum is 40.

The square root of 6478591 is about 2545.3076434883. The cubic root of 6478591 is about 186.4204367524.

The spelling of 6478591 in words is "six million, four hundred seventy-eight thousand, five hundred ninety-one".