1191180426 has 8 divisors (see below), whose sum is σ = 2382360864. Its totient is φ = 397060140.

The previous prime is 1191180413. The next prime is 1191180427. The reversal of 1191180426 is 6240811911.

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

1191180426 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1191180427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99265030 + ... + 99265041.

It is an arithmetic number, because the mean of its divisors is an integer number (297795108).

Almost surely, 2^1191180426 is an apocalyptic number.

1191180426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191180426 is a wasteful number, since it uses less digits than its factorization.

1191180426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198530076.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1191180426 is about 34513.4818005950. The cubic root of 1191180426 is about 1060.0487772736.

The spelling of 1191180426 in words is "one billion, one hundred ninety-one million, one hundred eighty thousand, four hundred twenty-six".