6391120 has 20 divisors (see below), whose sum is σ = 14859540. Its totient is φ = 2556416.

The previous prime is 6391117. The next prime is 6391123. The reversal of 6391120 is 211936.

It is an interprime number because it is at equal distance from previous prime (6391117) and next prime (6391123).

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 4892944 = 1224^2 + 2212^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 6391091 and 6391100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391123) 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, 39865 + ... + 40024.

It is an arithmetic number, because the mean of its divisors is an integer number (742977).

Almost surely, 2^6391120 is an apocalyptic number.

It is an amenable number.

6391120 is an abundant number, since it is smaller than the sum of its proper divisors (8468420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6391120 is a wasteful number, since it uses less digits than its factorization.

6391120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79902 (or 79896 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 6391120 is about 2528.0664548227. The cubic root of 6391120 is about 185.5776442059.

The spelling of 6391120 in words is "six million, three hundred ninety-one thousand, one hundred twenty".