Search a number
-
+
854921 is a prime number
BaseRepresentation
bin11010000101110001001
31121102201202
43100232021
5204324141
630153545
710160324
oct3205611
91542652
10854921
11534351
123528b5
1323c192
141837bb
1511d49b
hexd0b89

854921 has 2 divisors, whose sum is σ = 854922. Its totient is φ = 854920.

The previous prime is 854899. The next prime is 854923. The reversal of 854921 is 129458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698896 + 156025 = 836^2 + 395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-854921 is a prime.

Together with 854923, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (854923) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427460 + 427461.

It is an arithmetic number, because the mean of its divisors is an integer number (427461).

2854921 is an apocalyptic number.

It is an amenable number.

854921 is a deficient number, since it is larger than the sum of its proper divisors (1).

854921 is an equidigital number, since it uses as much as digits as its factorization.

854921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 854921 is about 924.6193811510. The cubic root of 854921 is about 94.9092762685.

The spelling of 854921 in words is "eight hundred fifty-four thousand, nine hundred twenty-one".