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261204 = 22321767
BaseRepresentation
bin111111110001010100
3111021022020
4333301110
531324304
65333140
72135346
oct776124
9437266
10261204
11169279
121071b0
1391b78
146b296
15525d9
hex3fc54

261204 has 12 divisors (see below), whose sum is σ = 609504. Its totient is φ = 87064.

The previous prime is 261169. The next prime is 261223. The reversal of 261204 is 402162.

261204 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 10872 + ... + 10895.

It is an arithmetic number, because the mean of its divisors is an integer number (50792).

2261204 is an apocalyptic number.

It is an amenable number.

261204 is an abundant number, since it is smaller than the sum of its proper divisors (348300).

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

261204 is a wasteful number, since it uses less digits than its factorization.

261204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21774 (or 21772 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 261204 is about 511.0812068546. The cubic root of 261204 is about 63.9234109864.

Adding to 261204 its reverse (402162), we get a palindrome (663366).

It can be divided in two parts, 261 and 204, that added together give a triangular number (465 = T30).

The spelling of 261204 in words is "two hundred sixty-one thousand, two hundred four".

Divisors: 1 2 3 4 6 12 21767 43534 65301 87068 130602 261204