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189261 = 32171237
BaseRepresentation
bin101110001101001101
3100121121200
4232031031
522024021
64020113
71415532
oct561515
9317550
10189261
1111a216
1291639
13681b7
144cd89
153b126
hex2e34d

189261 has 12 divisors (see below), whose sum is σ = 289692. Its totient is φ = 118656.

The previous prime is 189257. The next prime is 189271. The reversal of 189261 is 162981.

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 44100 = 381^2 + 210^2 .

It is not a de Polignac number, because 189261 - 22 = 189257 is a prime.

It is a super-2 number, since 2×1892612 = 71639452242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466 + ... + 771.

It is an arithmetic number, because the mean of its divisors is an integer number (24141).

2189261 is an apocalyptic number.

It is an amenable number.

189261 is a deficient number, since it is larger than the sum of its proper divisors (100431).

189261 is a wasteful number, since it uses less digits than its factorization.

189261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1257 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 189261 is about 435.0413773424. The cubic root of 189261 is about 57.4143400012.

It can be divided in two parts, 1892 and 61, that added together give a triangular number (1953 = T62).

The spelling of 189261 in words is "one hundred eighty-nine thousand, two hundred sixty-one".

Divisors: 1 3 9 17 51 153 1237 3711 11133 21029 63087 189261