1155125023 has 4 divisors (see below), whose sum is σ = 1243980808. Its totient is φ = 1066269240.

The previous prime is 1155125017. The next prime is 1155125029. The reversal of 1155125023 is 3205215511.

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

It is an interprime number because it is at equal distance from previous prime (1155125017) and next prime (1155125029).

It is a cyclic number.

It is not a de Polignac number, because 1155125023 - 2⁵ = 1155124991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155125029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44427873 + ... + 44427898.

It is an arithmetic number, because the mean of its divisors is an integer number (310995202).

Almost surely, 2^1155125023 is an apocalyptic number.

1155125023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1155125023 is a deficient number, since it is larger than the sum of its proper divisors (88855785).

1155125023 is an equidigital number, since it uses as much as digits as its factorization.

1155125023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88855784.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1155125023 is about 33987.1302554364. The cubic root of 1155125023 is about 1049.2436042961.

The spelling of 1155125023 in words is "one billion, one hundred fifty-five million, one hundred twenty-five thousand, twenty-three".