646259 has 2 divisors, whose sum is σ = 646260. Its totient is φ = 646258.

The previous prime is 646253. The next prime is 646267. The reversal of 646259 is 952646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646259 - 2⁸ = 646003 is a prime.

It is not a weakly prime, because it can be changed into another prime (646253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323129 + 323130.

It is an arithmetic number, because the mean of its divisors is an integer number (323130).

2⁶⁴⁶²⁵⁹ is an apocalyptic number.

646259 is a deficient number, since it is larger than the sum of its proper divisors (1).

646259 is an equidigital number, since it uses as much as digits as its factorization.

646259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 646259 is about 803.9023572549. The cubic root of 646259 is about 86.4574060512.

The spelling of 646259 in words is "six hundred forty-six thousand, two hundred fifty-nine".