858427 has 2 divisors, whose sum is σ = 858428. Its totient is φ = 858426.

The previous prime is 858397. The next prime is 858433. The reversal of 858427 is 724858.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 858392 and 858401.

It is not a weakly prime, because it can be changed into another prime (858457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429213 + 429214.

It is an arithmetic number, because the mean of its divisors is an integer number (429214).

2⁸⁵⁸⁴²⁷ is an apocalyptic number.

858427 is a deficient number, since it is larger than the sum of its proper divisors (1).

858427 is an equidigital number, since it uses as much as digits as its factorization.

858427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 34.

The square root of 858427 is about 926.5133566226. The cubic root of 858427 is about 95.0388391514.

It can be divided in two parts, 85842 and 7, that added together give a square (85849 = 293²).

The spelling of 858427 in words is "eight hundred fifty-eight thousand, four hundred twenty-seven".