1155240023 has 6 divisors (see below), whose sum is σ = 1343850696. Its totient is φ = 990205692.

The previous prime is 1155240013. The next prime is 1155240029. The reversal of 1155240023 is 3200425511.

It is not a de Polignac number, because 1155240023 - 2¹⁴ = 1155223639 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 (1155240029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11788115 + ... + 11788212.

It is an arithmetic number, because the mean of its divisors is an integer number (223975116).

Almost surely, 2^1155240023 is an apocalyptic number.

1155240023 is a deficient number, since it is larger than the sum of its proper divisors (188610673).

1155240023 is an equidigital number, since it uses as much as digits as its factorization.

1155240023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23576341 (or 23576334 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1155240023 is about 33988.8220301910. The cubic root of 1155240023 is about 1049.2784227524.

Adding to 1155240023 its reverse (3200425511), we get a palindrome (4355665534).

The spelling of 1155240023 in words is "one billion, one hundred fifty-five million, two hundred forty thousand, twenty-three".