1155023453 has 4 divisors (see below), whose sum is σ = 1205241888. Its totient is φ = 1104805020.

The previous prime is 1155023417. The next prime is 1155023477. The reversal of 1155023453 is 3543205511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155023453 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 (1155023483) 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, 25109183 + ... + 25109228.

It is an arithmetic number, because the mean of its divisors is an integer number (301310472).

Almost surely, 2^1155023453 is an apocalyptic number.

It is an amenable number.

1155023453 is a deficient number, since it is larger than the sum of its proper divisors (50218435).

1155023453 is an equidigital number, since it uses as much as digits as its factorization.

1155023453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50218434.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1155023453 is about 33985.6359805139. The cubic root of 1155023453 is about 1049.2128501080.

Adding to 1155023453 its reverse (3543205511), we get a palindrome (4698228964).

The spelling of 1155023453 in words is "one billion, one hundred fifty-five million, twenty-three thousand, four hundred fifty-three".