1181284749 has 16 divisors (see below), whose sum is σ = 1751286400. Its totient is φ = 786967488.

The previous prime is 1181284697. The next prime is 1181284787. The reversal of 1181284749 is 9474821811.

It is not a de Polignac number, because 1181284749 - 2⁸ = 1181284493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181284249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25512 + ... + 54894.

It is an arithmetic number, because the mean of its divisors is an integer number (109455400).

Almost surely, 2^1181284749 is an apocalyptic number.

It is an amenable number.

1181284749 is a deficient number, since it is larger than the sum of its proper divisors (570001651).

1181284749 is a wasteful number, since it uses less digits than its factorization.

1181284749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30881 (or 30875 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1181284749 is about 34369.8232320156. The cubic root of 1181284749 is about 1057.1051752778.

The spelling of 1181284749 in words is "one billion, one hundred eighty-one million, two hundred eighty-four thousand, seven hundred forty-nine".