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259381 is a prime number
BaseRepresentation
bin111111010100110101
3111011210201
4333110311
531300011
65320501
72130133
oct772465
9434721
10259381
11167971
12106131
13910a5
146a753
1551cc1
hex3f535

259381 has 2 divisors, whose sum is σ = 259382. Its totient is φ = 259380.

The previous prime is 259379. The next prime is 259387. The reversal of 259381 is 183952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255025 + 4356 = 505^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 259381 - 21 = 259379 is a prime.

It is a super-2 number, since 2×2593812 = 134557006322, which contains 22 as substring.

Together with 259379, it forms a pair of twin primes.

It is a Chen prime.

259381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129690 + 129691.

It is an arithmetic number, because the mean of its divisors is an integer number (129691).

2259381 is an apocalyptic number.

It is an amenable number.

259381 is a deficient number, since it is larger than the sum of its proper divisors (1).

259381 is an equidigital number, since it uses as much as digits as its factorization.

259381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 259381 is about 509.2946102208. The cubic root of 259381 is about 63.7743518398.

The spelling of 259381 in words is "two hundred fifty-nine thousand, three hundred eighty-one".