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268921 is a prime number
BaseRepresentation
bin1000001101001111001
3111122220001
41001221321
532101141
65433001
72200012
oct1015171
9448801
10268921
11174054
1210b761
1395533
1470009
1554a31
hex41a79

268921 has 2 divisors, whose sum is σ = 268922. Its totient is φ = 268920.

The previous prime is 268913. The next prime is 268927. The reversal of 268921 is 129862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156025 + 112896 = 395^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 268921 - 23 = 268913 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 268921.

It is not a weakly prime, because it can be changed into another prime (268927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134460 + 134461.

It is an arithmetic number, because the mean of its divisors is an integer number (134461).

2268921 is an apocalyptic number.

It is an amenable number.

268921 is a deficient number, since it is larger than the sum of its proper divisors (1).

268921 is an equidigital number, since it uses as much as digits as its factorization.

268921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 268921 is about 518.5759346518. The cubic root of 268921 is about 64.5468281614.

The spelling of 268921 in words is "two hundred sixty-eight thousand, nine hundred twenty-one".