1145115511 has 8 divisors (see below), whose sum is σ = 1154430000. Its totient is φ = 1135823040.

The previous prime is 1145115497. The next prime is 1145115551. The reversal of 1145115511 is 1155115411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145115511 - 2⁷ = 1145115383 is a prime.

It is a super-2 number, since 2×1145115511² = 2622579067065582242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145115551) 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 7 ways as a sum of consecutive naturals, for example, 108340 + ... + 118438.

It is an arithmetic number, because the mean of its divisors is an integer number (144303750).

Almost surely, 2^1145115511 is an apocalyptic number.

1145115511 is a deficient number, since it is larger than the sum of its proper divisors (9314489).

1145115511 is a wasteful number, since it uses less digits than its factorization.

1145115511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11009.

The product of its digits is 500, while the sum is 25.

The square root of 1145115511 is about 33839.5554196564. Note that the first 3 decimals coincide. The cubic root of 1145115511 is about 1046.2041356452.

It can be divided in two parts, 11451 and 15511, that added together give a palindrome (26962).

The spelling of 1145115511 in words is "one billion, one hundred forty-five million, one hundred fifteen thousand, five hundred eleven".