1161322730 has 16 divisors (see below), whose sum is σ = 2113869960. Its totient is φ = 459309312.

The previous prime is 1161322709. The next prime is 1161322753. The reversal of 1161322730 is 372231611.

It can be written as a sum of positive squares in 4 ways, for example, as 695324161 + 465998569 = 26369^2 + 21587^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161322730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651539 + ... + 653318.

Almost surely, 2^1161322730 is an apocalyptic number.

1161322730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161322730 is a deficient number, since it is larger than the sum of its proper divisors (952547230).

1161322730 is a wasteful number, since it uses less digits than its factorization.

1161322730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304953.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1161322730 is about 34078.1855444212. The cubic root of 1161322730 is about 1051.1167951106.

It can be divided in two parts, 11613 and 22730, that added together give a palindrome (34343).

The spelling of 1161322730 in words is "one billion, one hundred sixty-one million, three hundred twenty-two thousand, seven hundred thirty".