1156005797 has 8 divisors (see below), whose sum is σ = 1226921112. Its totient is φ = 1085414400.

The previous prime is 1156005793. The next prime is 1156005811. The reversal of 1156005797 is 7975006511.

It can be written as a sum of positive squares in 4 ways, for example, as 244328161 + 911677636 = 15631^2 + 30194^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1156005797 - 2² = 1156005793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156005793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73604 + ... + 87917.

It is an arithmetic number, because the mean of its divisors is an integer number (153365139).

Almost surely, 2^1156005797 is an apocalyptic number.

1156005797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1156005797 is a deficient number, since it is larger than the sum of its proper divisors (70915315).

1156005797 is a wasteful number, since it uses less digits than its factorization.

1156005797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161959.

The product of its (nonzero) digits is 66150, while the sum is 41.

The square root of 1156005797 is about 34000.0852498931. The cubic root of 1156005797 is about 1049.5102166201.

The spelling of 1156005797 in words is "one billion, one hundred fifty-six million, five thousand, seven hundred ninety-seven".