1145396491 has 2 divisors, whose sum is σ = 1145396492. Its totient is φ = 1145396490.

The previous prime is 1145396443. The next prime is 1145396503. The reversal of 1145396491 is 1946935411.

It is a strong prime.

It is an emirp because it is prime and its reverse (1946935411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145396491 - 2¹¹ = 1145394443 is a prime.

It is a super-2 number, since 2×1145396491² = 2623866243190226162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1145396411) 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 as a sum of consecutive naturals, namely, 572698245 + 572698246.

It is an arithmetic number, because the mean of its divisors is an integer number (572698246).

Almost surely, 2^1145396491 is an apocalyptic number.

1145396491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145396491 is an equidigital number, since it uses as much as digits as its factorization.

1145396491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 1145396491 is about 33843.7068153002. The cubic root of 1145396491 is about 1046.2896985993.

The spelling of 1145396491 in words is "one billion, one hundred forty-five million, three hundred ninety-six thousand, four hundred ninety-one".