6181491 has 8 divisors (see below), whose sum is σ = 8260864. Its totient is φ = 4111560.

The previous prime is 6181477. The next prime is 6181531. The reversal of 6181491 is 1941816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6181491 - 2⁷ = 6181363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6181451) 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 in 7 ways as a sum of consecutive naturals, for example, 655 + ... + 3576.

It is an arithmetic number, because the mean of its divisors is an integer number (1032608).

Almost surely, 2^6181491 is an apocalyptic number.

6181491 is a deficient number, since it is larger than the sum of its proper divisors (2079373).

6181491 is a wasteful number, since it uses less digits than its factorization.

6181491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721.

The product of its digits is 1728, while the sum is 30.

The square root of 6181491 is about 2486.2604449253. The cubic root of 6181491 is about 183.5260625199.

The spelling of 6181491 in words is "six million, one hundred eighty-one thousand, four hundred ninety-one".