1156266361 has 4 divisors (see below), whose sum is σ = 1167492352. Its totient is φ = 1145040372.

The previous prime is 1156266329. The next prime is 1156266367. The reversal of 1156266361 is 1636626511.

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 not a de Polignac number, because 1156266361 - 2⁵ = 1156266329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1156266361.

It is not an unprimeable number, because it can be changed into a prime (1156266367) 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 in 3 ways as a sum of consecutive naturals, for example, 5612841 + ... + 5613046.

It is an arithmetic number, because the mean of its divisors is an integer number (291873088).

Almost surely, 2^1156266361 is an apocalyptic number.

It is an amenable number.

1156266361 is a deficient number, since it is larger than the sum of its proper divisors (11225991).

1156266361 is a wasteful number, since it uses less digits than its factorization.

1156266361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11225990.

The product of its digits is 38880, while the sum is 37.

The square root of 1156266361 is about 34003.9168479162. The cubic root of 1156266361 is about 1049.5890639861.

The spelling of 1156266361 in words is "one billion, one hundred fifty-six million, two hundred sixty-six thousand, three hundred sixty-one".