8641491 has 32 divisors (see below), whose sum is σ = 13063680. Its totient is φ = 5051904.

The previous prime is 8641471. The next prime is 8641513. The reversal of 8641491 is 1941468.

It is not a de Polignac number, because 8641491 - 2¹¹ = 8639443 is a prime.

8641491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8641421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62100 + ... + 62238.

It is an arithmetic number, because the mean of its divisors is an integer number (408240).

Almost surely, 2^8641491 is an apocalyptic number.

8641491 is a deficient number, since it is larger than the sum of its proper divisors (4422189).

8641491 is a wasteful number, since it uses less digits than its factorization.

8641491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235.

The product of its digits is 6912, while the sum is 33.

The square root of 8641491 is about 2939.6413046493. The cubic root of 8641491 is about 205.2089165063.

The spelling of 8641491 in words is "eight million, six hundred forty-one thousand, four hundred ninety-one".