1155131245 has 4 divisors (see below), whose sum is σ = 1386157500. Its totient is φ = 924104992.

The previous prime is 1155131227. The next prime is 1155131251. The reversal of 1155131245 is 5421315511.

1155131245 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 243453609 + 911677636 = 15603^2 + 30194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155131245 - 2²⁹ = 618260333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115513120 + ... + 115513129.

It is an arithmetic number, because the mean of its divisors is an integer number (346539375).

Almost surely, 2^1155131245 is an apocalyptic number.

It is an amenable number.

1155131245 is a deficient number, since it is larger than the sum of its proper divisors (231026255).

1155131245 is an equidigital number, since it uses as much as digits as its factorization.

1155131245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231026254.

The product of its digits is 3000, while the sum is 28.

The square root of 1155131245 is about 33987.2217899610. The cubic root of 1155131245 is about 1049.2454881851.

Adding to 1155131245 its reverse (5421315511), we get a palindrome (6576446756).

The spelling of 1155131245 in words is "one billion, one hundred fifty-five million, one hundred thirty-one thousand, two hundred forty-five".