1145023155 has 32 divisors (see below), whose sum is σ = 2039961600. Its totient is φ = 609369696.

The previous prime is 1145023123. The next prime is 1145023171. The reversal of 1145023155 is 5513205411.

1145023155 is a `hidden beast` number, since 1 + 1 + 4 + 502 + 3 + 155 = 666.

It is not a de Polignac number, because 1145023155 - 2⁵ = 1145023123 is a prime.

It is a super-2 number, since 2×1145023155² = 2622156050972308050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55812 + ... + 73518.

It is an arithmetic number, because the mean of its divisors is an integer number (63748800).

Almost surely, 2^1145023155 is an apocalyptic number.

1145023155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1145023155 is a deficient number, since it is larger than the sum of its proper divisors (894938445).

1145023155 is a wasteful number, since it uses less digits than its factorization.

1145023155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18200 (or 18194 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1145023155 is about 33838.1907761039. The cubic root of 1145023155 is about 1046.1760086932.

Adding to 1145023155 its reverse (5513205411), we get a palindrome (6658228566).

The spelling of 1145023155 in words is "one billion, one hundred forty-five million, twenty-three thousand, one hundred fifty-five".