1161204015 has 16 divisors (see below), whose sum is σ = 1881446400. Its totient is φ = 611468832.

The previous prime is 1161204007. The next prime is 1161204017. The reversal of 1161204015 is 5104021611.

It is not a de Polignac number, because 1161204015 - 2³ = 1161204007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161203982 and 1161204000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161204017) 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, 488775 + ... + 491144.

It is an arithmetic number, because the mean of its divisors is an integer number (117590400).

Almost surely, 2^1161204015 is an apocalyptic number.

1161204015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161204015 is a deficient number, since it is larger than the sum of its proper divisors (720242385).

1161204015 is an equidigital number, since it uses as much as digits as its factorization.

1161204015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980006.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1161204015 is about 34076.4436964892. The cubic root of 1161204015 is about 1051.0809774522.

Adding to 1161204015 its reverse (5104021611), we get a palindrome (6265225626).

The spelling of 1161204015 in words is "one billion, one hundred sixty-one million, two hundred four thousand, fifteen".