1156311245 has 4 divisors (see below), whose sum is σ = 1387573500. Its totient is φ = 925048992.

The previous prime is 1156311227. The next prime is 1156311257. The reversal of 1156311245 is 5421136511.

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 494484169 + 661827076 = 22237^2 + 25726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156311245 - 2¹⁴ = 1156294861 is a prime.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 115631120 + ... + 115631129.

It is an arithmetic number, because the mean of its divisors is an integer number (346893375).

Almost surely, 2^1156311245 is an apocalyptic number.

It is an amenable number.

1156311245 is a deficient number, since it is larger than the sum of its proper divisors (231262255).

1156311245 is an equidigital number, since it uses as much as digits as its factorization.

1156311245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231262254.

The product of its digits is 3600, while the sum is 29.

The square root of 1156311245 is about 34004.5768243041. The cubic root of 1156311245 is about 1049.6026448090.

Adding to 1156311245 its reverse (5421136511), we get a palindrome (6577447756).

The spelling of 1156311245 in words is "one billion, one hundred fifty-six million, three hundred eleven thousand, two hundred forty-five".