161435726 has 4 divisors (see below), whose sum is σ = 242153592. Its totient is φ = 80717862.

The previous prime is 161435719. The next prime is 161435749. The reversal of 161435726 is 627534161.

161435726 is digitally balanced in base 2, 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: 627534161 = 29 ⋅21639109.

It is a super-2 number, since 2×161435726² = 52122987258294152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40358930 + ... + 40358933.

It is an arithmetic number, because the mean of its divisors is an integer number (60538398).

Almost surely, 2^161435726 is an apocalyptic number.

161435726 is a deficient number, since it is larger than the sum of its proper divisors (80717866).

161435726 is an equidigital number, since it uses as much as digits as its factorization.

161435726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80717865.

The product of its digits is 30240, while the sum is 35.

The square root of 161435726 is about 12705.7359487753. The cubic root of 161435726 is about 544.5025070413.

Adding to 161435726 its reverse (627534161), we get a palindrome (788969887).

The spelling of 161435726 in words is "one hundred sixty-one million, four hundred thirty-five thousand, seven hundred twenty-six".