161436 has 24 divisors (see below), whose sum is σ = 411264. Its totient is φ = 48880.

The previous prime is 161411. The next prime is 161453. The reversal of 161436 is 634161.

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

161436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480 + ... + 743.

It is an arithmetic number, because the mean of its divisors is an integer number (17136).

2¹⁶¹⁴³⁶ is an apocalyptic number.

It is an amenable number.

161436 is an abundant number, since it is smaller than the sum of its proper divisors (249828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161436 is a wasteful number, since it uses less digits than its factorization.

161436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1239 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 161436 is about 401.7909904415. The cubic root of 161436 is about 54.4502815097.

Adding to 161436 its reverse (634161), we get a palindrome (795597).

The spelling of 161436 in words is "one hundred sixty-one thousand, four hundred thirty-six".