1181550534 has 12 divisors (see below), whose sum is σ = 2363269476. Its totient is φ = 393822112.

The previous prime is 1181550533. The next prime is 1181550577. The reversal of 1181550534 is 4350551811.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1181550495 and 1181550504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181550533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77182 + ... + 91214.

It is an arithmetic number, because the mean of its divisors is an integer number (196939123).

Almost surely, 2^1181550534 is an apocalyptic number.

1181550534 is an abundant number, since it is smaller than the sum of its proper divisors (1181718942).

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

1181550534 is an frugal number, since it uses more digits than its factorization.

1181550534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28071 (or 14038 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 1181550534 is about 34373.6895604763. The cubic root of 1181550534 is about 1057.1844510070.

The spelling of 1181550534 in words is "one billion, one hundred eighty-one million, five hundred fifty thousand, five hundred thirty-four".