1156266473 has 2 divisors, whose sum is σ = 1156266474. Its totient is φ = 1156266472.

The previous prime is 1156266457. The next prime is 1156266487. The reversal of 1156266473 is 3746626511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 617423104 + 538843369 = 24848^2 + 23213^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156266473 - 2⁴ = 1156266457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1156266473.

It is not a weakly prime, because it can be changed into another prime (1156266403) by changing a digit.

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 as a sum of consecutive naturals, namely, 578133236 + 578133237.

It is an arithmetic number, because the mean of its divisors is an integer number (578133237).

Almost surely, 2^1156266473 is an apocalyptic number.

It is an amenable number.

1156266473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156266473 is an equidigital number, since it uses as much as digits as its factorization.

1156266473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 1156266473 is about 34003.9184947853. The cubic root of 1156266473 is about 1049.5890978750.

The spelling of 1156266473 in words is "one billion, one hundred fifty-six million, two hundred sixty-six thousand, four hundred seventy-three".