161236 has 12 divisors (see below), whose sum is σ = 285012. Its totient is φ = 79808.

The previous prime is 161233. The next prime is 161237. The reversal of 161236 is 632161.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 67600 = 306^2 + 260^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (23751).

2¹⁶¹²³⁶ is an apocalyptic number.

It is an amenable number.

161236 is a deficient number, since it is larger than the sum of its proper divisors (123776).

161236 is a wasteful number, since it uses less digits than its factorization.

161236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 408 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 161236 is about 401.5420276883. The cubic root of 161236 is about 54.4277864104.

Adding to 161236 its reverse (632161), we get a palindrome (793397).

It can be divided in two parts, 16123 and 6, that added together give a square (16129 = 127²).

The spelling of 161236 in words is "one hundred sixty-one thousand, two hundred thirty-six".