1181398546 has 8 divisors (see below), whose sum is σ = 1773385164. Its totient is φ = 590270160.

The previous prime is 1181398541. The next prime is 1181398579. The reversal of 1181398546 is 6458931811.

It can be written as a sum of positive squares in 2 ways, for example, as 1062042921 + 119355625 = 32589^2 + 10925^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1181398496 and 1181398505.

It is not an unprimeable number, because it can be changed into a prime (1181398541) 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, 211105 + ... + 216628.

Almost surely, 2^1181398546 is an apocalyptic number.

1181398546 is a deficient number, since it is larger than the sum of its proper divisors (591986618).

1181398546 is a wasteful number, since it uses less digits than its factorization.

1181398546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429116.

The product of its digits is 207360, while the sum is 46.

The square root of 1181398546 is about 34371.4786705489. The cubic root of 1181398546 is about 1057.1391189805.

The spelling of 1181398546 in words is "one billion, one hundred eighty-one million, three hundred ninety-eight thousand, five hundred forty-six".