1155286243 has 2 divisors, whose sum is σ = 1155286244. Its totient is φ = 1155286242.

The previous prime is 1155286201. The next prime is 1155286267. The reversal of 1155286243 is 3426825511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155286243 - 2¹⁷ = 1155155171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155286843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577643121 + 577643122.

It is an arithmetic number, because the mean of its divisors is an integer number (577643122).

Almost surely, 2^1155286243 is an apocalyptic number.

1155286243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155286243 is an equidigital number, since it uses as much as digits as its factorization.

1155286243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 1155286243 is about 33989.5019528089. The cubic root of 1155286243 is about 1049.2924160931.

It can be divided in two parts, 115528 and 6243, that added together give a triangular number (121771 = T₄₉₃).

The spelling of 1155286243 in words is "one billion, one hundred fifty-five million, two hundred eighty-six thousand, two hundred forty-three".