6181281 has 12 divisors (see below), whose sum is σ = 9011860. Its totient is φ = 4082400.

The previous prime is 6181277. The next prime is 6181291. The reversal of 6181281 is 1821816.

It can be written as a sum of positive squares in 2 ways, for example, as 4064256 + 2117025 = 2016^2 + 1455^2 .

It is not a de Polignac number, because 6181281 - 2² = 6181277 is a prime.

It is a super-2 number, since 2×6181281² = 76416469601922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6181261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2170 + ... + 4131.

Almost surely, 2^6181281 is an apocalyptic number.

It is an amenable number.

6181281 is a deficient number, since it is larger than the sum of its proper divisors (2830579).

6181281 is a wasteful number, since it uses less digits than its factorization.

6181281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416 (or 6413 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 6181281 is about 2486.2182124665. The cubic root of 6181281 is about 183.5239842236.

The spelling of 6181281 in words is "six million, one hundred eighty-one thousand, two hundred eighty-one".