6117581 has 2 divisors, whose sum is σ = 6117582. Its totient is φ = 6117580.

The previous prime is 6117557. The next prime is 6117583. The reversal of 6117581 is 1857116.

6117581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5929225 + 188356 = 2435^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 6117581 - 2²² = 1923277 is a prime.

It is a super-2 number, since 2×6117581² = 74849594583122, which contains 22 as substring.

Together with 6117583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6117583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3058790 + 3058791.

It is an arithmetic number, because the mean of its divisors is an integer number (3058791).

Almost surely, 2^6117581 is an apocalyptic number.

It is an amenable number.

6117581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6117581 is an equidigital number, since it uses as much as digits as its factorization.

6117581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 6117581 is about 2473.3744156516. The cubic root of 6117581 is about 182.8913824869.

It can be divided in two parts, 611 and 7581, that added together give a 13-th power (8192 = 2¹³).

The spelling of 6117581 in words is "six million, one hundred seventeen thousand, five hundred eighty-one".