1181275798 has 4 divisors (see below), whose sum is σ = 1771913700. Its totient is φ = 590637898.

The previous prime is 1181275789. The next prime is 1181275807. The reversal of 1181275798 is 8975721811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8975721811 = 7 ⋅1282245973.

It is an interprime number because it is at equal distance from previous prime (1181275789) and next prime (1181275807).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295318948 + ... + 295318951.

It is an arithmetic number, because the mean of its divisors is an integer number (442978425).

Almost surely, 2^1181275798 is an apocalyptic number.

1181275798 is a deficient number, since it is larger than the sum of its proper divisors (590637902).

1181275798 is an equidigital number, since it uses as much as digits as its factorization.

1181275798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590637901.

The product of its digits is 282240, while the sum is 49.

The square root of 1181275798 is about 34369.6930157952. The cubic root of 1181275798 is about 1057.1025052548.

The spelling of 1181275798 in words is "one billion, one hundred eighty-one million, two hundred seventy-five thousand, seven hundred ninety-eight".