8551491 has 16 divisors (see below), whose sum is σ = 12704160. Its totient is φ = 5080320.

The previous prime is 8551489. The next prime is 8551507. The reversal of 8551491 is 1941558.

8551491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8551491 - 2¹ = 8551489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8551421) 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, 2650 + ... + 4911.

It is an arithmetic number, because the mean of its divisors is an integer number (794010).

Almost surely, 2^8551491 is an apocalyptic number.

8551491 is a deficient number, since it is larger than the sum of its proper divisors (4152669).

8551491 is a wasteful number, since it uses less digits than its factorization.

8551491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606.

The product of its digits is 7200, while the sum is 33.

The square root of 8551491 is about 2924.2932479490. The cubic root of 8551491 is about 204.4940208636.

It can be divided in two parts, 855 and 1491, that added together give a triangular number (2346 = T₆₈).

The spelling of 8551491 in words is "eight million, five hundred fifty-one thousand, four hundred ninety-one".