1156215266 has 8 divisors (see below), whose sum is σ = 1745963100. Its totient is φ = 574227568.

The previous prime is 1156215217. The next prime is 1156215283. The reversal of 1156215266 is 6625126511.

It can be written as a sum of positive squares in 2 ways, for example, as 1143860041 + 12355225 = 33821^2 + 3515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1939661 + ... + 1940256.

Almost surely, 2^1156215266 is an apocalyptic number.

1156215266 is a deficient number, since it is larger than the sum of its proper divisors (589747834).

1156215266 is a wasteful number, since it uses less digits than its factorization.

1156215266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880068.

The product of its digits is 21600, while the sum is 35.

The square root of 1156215266 is about 34003.1655291092. The cubic root of 1156215266 is about 1049.5736034356.

The spelling of 1156215266 in words is "one billion, one hundred fifty-six million, two hundred fifteen thousand, two hundred sixty-six".