4511491 has 2 divisors, whose sum is σ = 4511492. Its totient is φ = 4511490.

The previous prime is 4511489. The next prime is 4511527. The reversal of 4511491 is 1941154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4511491 - 2¹ = 4511489 is a prime.

Together with 4511489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4511191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2255745 + 2255746.

It is an arithmetic number, because the mean of its divisors is an integer number (2255746).

Almost surely, 2^4511491 is an apocalyptic number.

4511491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4511491 is an equidigital number, since it uses as much as digits as its factorization.

4511491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

The square root of 4511491 is about 2124.0270713906. The cubic root of 4511491 is about 165.2367705770.

The spelling of 4511491 in words is "four million, five hundred eleven thousand, four hundred ninety-one".