161102434 has 4 divisors (see below), whose sum is σ = 241653654. Its totient is φ = 80551216.

The previous prime is 161102423. The next prime is 161102437. The reversal of 161102434 is 434201161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158684409 + 2418025 = 12597^2 + 1555^2 .

It is not an unprimeable number, because it can be changed into a prime (161102437) by changing a digit.

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 as a sum of consecutive naturals, namely, 40275607 + ... + 40275610.

Almost surely, 2^161102434 is an apocalyptic number.

161102434 is a deficient number, since it is larger than the sum of its proper divisors (80551220).

161102434 is an equidigital number, since it uses as much as digits as its factorization.

161102434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80551219.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 161102434 is about 12692.6133636852. The cubic root of 161102434 is about 544.1275314647.

Adding to 161102434 its reverse (434201161), we get a palindrome (595303595).

The spelling of 161102434 in words is "one hundred sixty-one million, one hundred two thousand, four hundred thirty-four".