161120534 has 4 divisors (see below), whose sum is σ = 241680804. Its totient is φ = 80560266.

The previous prime is 161120521. The next prime is 161120537. The reversal of 161120534 is 435021161.

161120534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435021161 = 14731 ⋅29531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161120537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40280132 + ... + 40280135.

It is an arithmetic number, because the mean of its divisors is an integer number (60420201).

Almost surely, 2^161120534 is an apocalyptic number.

161120534 is a deficient number, since it is larger than the sum of its proper divisors (80560270).

161120534 is an equidigital number, since it uses as much as digits as its factorization.

161120534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80560269.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 161120534 is about 12693.3263567908. The cubic root of 161120534 is about 544.1479084370.

Adding to 161120534 its reverse (435021161), we get a palindrome (596141695).

The spelling of 161120534 in words is "one hundred sixty-one million, one hundred twenty thousand, five hundred thirty-four".