645067 has 2 divisors, whose sum is σ = 645068. Its totient is φ = 645066.

The previous prime is 645049. The next prime is 645077. The reversal of 645067 is 760546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645067 - 2¹⁹ = 120779 is a prime.

It is a super-2 number, since 2×645067² = 832222868978, which contains 22 as substring.

645067 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (645037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322533 + 322534.

It is an arithmetic number, because the mean of its divisors is an integer number (322534).

2⁶⁴⁵⁰⁶⁷ is an apocalyptic number.

645067 is a deficient number, since it is larger than the sum of its proper divisors (1).

645067 is an equidigital number, since it uses as much as digits as its factorization.

645067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 645067 is about 803.1606315053. The cubic root of 645067 is about 86.4042175439.

The spelling of 645067 in words is "six hundred forty-five thousand, sixty-seven".