1161500123 has 8 divisors (see below), whose sum is σ = 1327669248. Its totient is φ = 995391144.

The previous prime is 1161500117. The next prime is 1161500149. The reversal of 1161500123 is 3210051611.

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

It is a cyclic number.

It is not a de Polignac number, because 1161500123 - 2⁶ = 1161500059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161500095 and 1161500104.

It is not an unprimeable number, because it can be changed into a prime (1161500173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39590 + ... + 62372.

It is an arithmetic number, because the mean of its divisors is an integer number (165958656).

Almost surely, 2^1161500123 is an apocalyptic number.

1161500123 is a deficient number, since it is larger than the sum of its proper divisors (166169125).

1161500123 is an equidigital number, since it uses as much as digits as its factorization.

1161500123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30073.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1161500123 is about 34080.7881804397. The cubic root of 1161500123 is about 1051.1703120368.

Adding to 1161500123 its reverse (3210051611), we get a palindrome (4371551734).

The spelling of 1161500123 in words is "one billion, one hundred sixty-one million, five hundred thousand, one hundred twenty-three".