1156105221 has 8 divisors (see below), whose sum is σ = 1543733280. Its totient is φ = 769606992.

The previous prime is 1156105211. The next prime is 1156105229. The reversal of 1156105221 is 1225016511.

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

It is not a de Polignac number, because 1156105221 - 2⁹ = 1156104709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1156105191 and 1156105200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156105229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280066 + ... + 284163.

It is an arithmetic number, because the mean of its divisors is an integer number (192966660).

Almost surely, 2^1156105221 is an apocalyptic number.

It is an amenable number.

1156105221 is a deficient number, since it is larger than the sum of its proper divisors (387628059).

1156105221 is an equidigital number, since it uses as much as digits as its factorization.

1156105221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564915.

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 1156105221 is about 34001.5473324377. The cubic root of 1156105221 is about 1049.5403039872.

The spelling of 1156105221 in words is "one billion, one hundred fifty-six million, one hundred five thousand, two hundred twenty-one".