1145992817 has 4 divisors (see below), whose sum is σ = 1146244596. Its totient is φ = 1145741040.

The previous prime is 1145992741. The next prime is 1145992819. The reversal of 1145992817 is 7182995411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7182995411 = 59149 ⋅121439.

It can be written as a sum of positive squares in 2 ways, for example, as 764024881 + 381967936 = 27641^2 + 19544^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145992817 - 2¹⁰ = 1145991793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145992819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118934 + ... + 128207.

It is an arithmetic number, because the mean of its divisors is an integer number (286561149).

Almost surely, 2^1145992817 is an apocalyptic number.

It is an amenable number.

1145992817 is a deficient number, since it is larger than the sum of its proper divisors (251779).

1145992817 is an equidigital number, since it uses as much as digits as its factorization.

1145992817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251778.

The product of its digits is 181440, while the sum is 47.

The square root of 1145992817 is about 33852.5156672292. The cubic root of 1145992817 is about 1046.4712431587.

The spelling of 1145992817 in words is "one billion, one hundred forty-five million, nine hundred ninety-two thousand, eight hundred seventeen".