645267 has 8 divisors (see below), whose sum is σ = 983296. Its totient is φ = 368712.

The previous prime is 645257. The next prime is 645313. The reversal of 645267 is 762546.

645267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645267 - 2⁸ = 645011 is a prime.

It is a Duffinian number.

645267 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (645257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15343 + ... + 15384.

It is an arithmetic number, because the mean of its divisors is an integer number (122912).

2⁶⁴⁵²⁶⁷ is an apocalyptic number.

645267 is a deficient number, since it is larger than the sum of its proper divisors (338029).

645267 is a wasteful number, since it uses less digits than its factorization.

645267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30737.

The product of its digits is 10080, while the sum is 30.

The square root of 645267 is about 803.2851299508. The cubic root of 645267 is about 86.4131463621.

The spelling of 645267 in words is "six hundred forty-five thousand, two hundred sixty-seven".