645463 has 16 divisors (see below), whose sum is σ = 818496. Its totient is φ = 495360.

The previous prime is 645443. The next prime is 645467. The reversal of 645463 is 364546.

It is a cyclic number.

It is not a de Polignac number, because 645463 - 2⁵ = 645431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3645 + ... + 3817.

It is an arithmetic number, because the mean of its divisors is an integer number (51156).

2⁶⁴⁵⁴⁶³ is an apocalyptic number.

645463 is a deficient number, since it is larger than the sum of its proper divisors (173033).

645463 is a wasteful number, since it uses less digits than its factorization.

645463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its digits is 8640, while the sum is 28.

The square root of 645463 is about 803.4071197096. The cubic root of 645463 is about 86.4218948141.

The spelling of 645463 in words is "six hundred forty-five thousand, four hundred sixty-three".