1145191 has 2 divisors, whose sum is σ = 1145192. Its totient is φ = 1145190.

The previous prime is 1145189. The next prime is 1145203. The reversal of 1145191 is 1915411.

It is a weak prime.

It is an emirp because it is prime and its reverse (1915411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145191 - 2¹ = 1145189 is a prime.

It is a super-2 number, since 2×1145191² = 2622924852962, which contains 22 as substring.

Together with 1145189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572595 + 572596.

It is an arithmetic number, because the mean of its divisors is an integer number (572596).

2^1145191 is an apocalyptic number.

1145191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145191 is an equidigital number, since it uses as much as digits as its factorization.

1145191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 22.

The square root of 1145191 is about 1070.1359726689. The cubic root of 1145191 is about 104.6227124641.

The spelling of 1145191 in words is "one million, one hundred forty-five thousand, one hundred ninety-one".