645202 has 8 divisors (see below), whose sum is σ = 1018800. Its totient is φ = 305604.

The previous prime is 645187. The next prime is 645233. The reversal of 645202 is 202546.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 645202.

It is an unprimeable number.

645202 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8452 + ... + 8527.

It is an arithmetic number, because the mean of its divisors is an integer number (127350).

2⁶⁴⁵²⁰² is an apocalyptic number.

645202 is a deficient number, since it is larger than the sum of its proper divisors (373598).

645202 is a wasteful number, since it uses less digits than its factorization.

645202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17000.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 645202 is about 803.2446700726. The cubic root of 645202 is about 86.4102446986.

Adding to 645202 its reverse (202546), we get a palindrome (847748).

The spelling of 645202 in words is "six hundred forty-five thousand, two hundred two".