8391255 has 16 divisors (see below), whose sum is σ = 14133120. Its totient is φ = 4239648.

The previous prime is 8391223. The next prime is 8391263. The reversal of 8391255 is 5521938.

It is not a de Polignac number, because 8391255 - 2⁵ = 8391223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14437 + ... + 15006.

It is an arithmetic number, because the mean of its divisors is an integer number (883320).

Almost surely, 2^8391255 is an apocalyptic number.

8391255 is a deficient number, since it is larger than the sum of its proper divisors (5741865).

8391255 is a wasteful number, since it uses less digits than its factorization.

8391255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29470.

The product of its digits is 10800, while the sum is 33.

The square root of 8391255 is about 2896.7663005496. The cubic root of 8391255 is about 203.2087041216.

It can be divided in two parts, 8391 and 255, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 8391255 in words is "eight million, three hundred ninety-one thousand, two hundred fifty-five".