1145505111 has 4 divisors (see below), whose sum is σ = 1527340152. Its totient is φ = 763670072.

The previous prime is 1145505083. The next prime is 1145505113. The reversal of 1145505111 is 1115055411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1145505111 - 2⁹ = 1145504599 is a prime.

It is a super-3 number, since 3×1145505111³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145505113) 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 in 3 ways as a sum of consecutive naturals, for example, 190917516 + ... + 190917521.

It is an arithmetic number, because the mean of its divisors is an integer number (381835038).

Almost surely, 2^1145505111 is an apocalyptic number.

1145505111 is a deficient number, since it is larger than the sum of its proper divisors (381835041).

1145505111 is an equidigital number, since it uses as much as digits as its factorization.

1145505111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381835040.

The product of its (nonzero) digits is 500, while the sum is 24.

The square root of 1145505111 is about 33845.3115069133. The cubic root of 1145505111 is about 1046.3227713957.

The spelling of 1145505111 in words is "one billion, one hundred forty-five million, five hundred five thousand, one hundred eleven".