1156220017 has 4 divisors (see below), whose sum is σ = 1165046256. Its totient is φ = 1147393780.

The previous prime is 1156220003. The next prime is 1156220059. The reversal of 1156220017 is 7100226511.

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 a de Polignac number, because none of the positive numbers 2^k-1156220017 is a prime.

It is a super-2 number, since 2×1156220017² = 2673689455422960578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1156219973 and 1156220000.

It is not an unprimeable number, because it can be changed into a prime (1156226017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4412923 + ... + 4413184.

It is an arithmetic number, because the mean of its divisors is an integer number (291261564).

Almost surely, 2^1156220017 is an apocalyptic number.

It is an amenable number.

1156220017 is a deficient number, since it is larger than the sum of its proper divisors (8826239).

1156220017 is an equidigital number, since it uses as much as digits as its factorization.

1156220017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8826238.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1156220017 is about 34003.2353901802. The cubic root of 1156220017 is about 1049.5750410334.

Adding to 1156220017 its reverse (7100226511), we get a palindrome (8256446528).

The spelling of 1156220017 in words is "one billion, one hundred fifty-six million, two hundred twenty thousand, seventeen".