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61143 = 389229
BaseRepresentation
bin1110111011010111
310002212120
432323113
53424033
61151023
7343155
oct167327
9102776
1061143
1141a35
122b473
1321aa4
14183d5
15131b3
hexeed7

61143 has 8 divisors (see below), whose sum is σ = 82800. Its totient is φ = 40128.

The previous prime is 61141. The next prime is 61151. The reversal of 61143 is 34116.

Adding to 61143 its reverse (34116), we get a palindrome (95259).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61143 - 21 = 61141 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153 + ... + 381.

It is an arithmetic number, because the mean of its divisors is an integer number (10350).

261143 is an apocalyptic number.

61143 is a deficient number, since it is larger than the sum of its proper divisors (21657).

61143 is a wasteful number, since it uses less digits than its factorization.

61143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its digits is 72, while the sum is 15.

The square root of 61143 is about 247.2711062781. The cubic root of 61143 is about 39.3957084317.

The spelling of 61143 in words is "sixty-one thousand, one hundred forty-three".

Divisors: 1 3 89 229 267 687 20381 61143