1195078881 has 4 divisors (see below), whose sum is σ = 1593438512. Its totient is φ = 796719252.

The previous prime is 1195078879. The next prime is 1195078883. The reversal of 1195078881 is 1888705911.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1888705911 = 3 ⋅629568637.

It is an interprime number because it is at equal distance from previous prime (1195078879) and next prime (1195078883).

It is not a de Polignac number, because 1195078881 - 2¹ = 1195078879 is a prime.

It is a super-2 number, since 2×1195078881² = 2856427063624424322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1195078881.

It is not an unprimeable number, because it can be changed into a prime (1195078883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199179811 + ... + 199179816.

It is an arithmetic number, because the mean of its divisors is an integer number (398359628).

Almost surely, 2^1195078881 is an apocalyptic number.

It is an amenable number.

1195078881 is a deficient number, since it is larger than the sum of its proper divisors (398359631).

1195078881 is an equidigital number, since it uses as much as digits as its factorization.

1195078881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398359630.

The product of its (nonzero) digits is 161280, while the sum is 48.

The square root of 1195078881 is about 34569.9129446402. The cubic root of 1195078881 is about 1061.2039485789.

The spelling of 1195078881 in words is "one billion, one hundred ninety-five million, seventy-eight thousand, eight hundred eighty-one".