191681241 has 16 divisors (see below), whose sum is σ = 267007104. Its totient is φ = 122084864.

The previous prime is 191681209. The next prime is 191681251. The reversal of 191681241 is 142186191.

It is a cyclic number.

It is not a de Polignac number, because 191681241 - 2⁵ = 191681209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191681251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112105 + ... + 113801.

It is an arithmetic number, because the mean of its divisors is an integer number (16687944).

Almost surely, 2^191681241 is an apocalyptic number.

It is an amenable number.

191681241 is a deficient number, since it is larger than the sum of its proper divisors (75325863).

191681241 is a wasteful number, since it uses less digits than its factorization.

191681241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360.

The product of its digits is 3456, while the sum is 33.

The square root of 191681241 is about 13844.8994579231. The cubic root of 191681241 is about 576.5803943169.

The spelling of 191681241 in words is "one hundred ninety-one million, six hundred eighty-one thousand, two hundred forty-one".