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161596 = 2271569
BaseRepresentation
bin100111011100111100
322012200001
4213130330
520132341
63244044
71242061
oct473474
9265601
10161596
11100456
1279624
1358726
1442c68
1532d31
hex2773c

161596 has 12 divisors (see below), whose sum is σ = 287280. Its totient is φ = 79520.

The previous prime is 161591. The next prime is 161599. The reversal of 161596 is 695161.

161596 is a nontrivial binomial coefficient, being equal to C(569, 2).

It is a super-2 number, since 2×1615962 = 52226534432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161591) 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 in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 568.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2161596 is an apocalyptic number.

161596 is the 568-th triangular number.

161596 is the 190-th centered nonagonal number.

It is an amenable number.

161596 is a deficient number, since it is larger than the sum of its proper divisors (125684).

161596 is a wasteful number, since it uses less digits than its factorization.

161596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 642 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 161596 is about 401.9900496281. The cubic root of 161596 is about 54.4682642158.

Adding to 161596 its product of digits (1620), we get a square (163216 = 4042).

It can be divided in two parts, 1615 and 96, that added together give a triangular number (1711 = T58).

The spelling of 161596 in words is "one hundred sixty-one thousand, five hundred ninety-six".

Divisors: 1 2 4 71 142 284 569 1138 2276 40399 80798 161596