6391156 has 12 divisors (see below), whose sum is σ = 11256868. Its totient is φ = 3174912.

The previous prime is 6391129. The next prime is 6391157. The reversal of 6391156 is 6511936.

It can be written as a sum of positive squares in 2 ways, for example, as 3027600 + 3363556 = 1740^2 + 1834^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391157) 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, 4461 + ... + 5716.

Almost surely, 2^6391156 is an apocalyptic number.

It is an amenable number.

6391156 is a deficient number, since it is larger than the sum of its proper divisors (4865712).

6391156 is a wasteful number, since it uses less digits than its factorization.

6391156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338 (or 10336 counting only the distinct ones).

The product of its digits is 4860, while the sum is 31.

The square root of 6391156 is about 2528.0735748787. The cubic root of 6391156 is about 185.5779926467.

It can be divided in two parts, 63 and 91156, that added together give a palindrome (91219).

The spelling of 6391156 in words is "six million, three hundred ninety-one thousand, one hundred fifty-six".