6391255 has 8 divisors (see below), whose sum is σ = 8259552. Its totient is φ = 4719648.

The previous prime is 6391247. The next prime is 6391261. The reversal of 6391255 is 5521936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6391255 - 2³ = 6391247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49099 + ... + 49228.

It is an arithmetic number, because the mean of its divisors is an integer number (1032444).

Almost surely, 2^6391255 is an apocalyptic number.

6391255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6391255 is a deficient number, since it is larger than the sum of its proper divisors (1868297).

6391255 is a wasteful number, since it uses less digits than its factorization.

6391255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98345.

The product of its digits is 8100, while the sum is 31.

The square root of 6391255 is about 2528.0931549292. The cubic root of 6391255 is about 185.5789508524.

The spelling of 6391255 in words is "six million, three hundred ninety-one thousand, two hundred fifty-five".