645362 has 8 divisors (see below), whose sum is σ = 973056. Its totient is φ = 321012.

The previous prime is 645353. The next prime is 645367. The reversal of 645362 is 263546.

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

It is a super-2 number, since 2×645362² = 832984222088, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645362.

It is not an unprimeable number, because it can be changed into a prime (645367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (121632).

2⁶⁴⁵³⁶² is an apocalyptic number.

645362 is a deficient number, since it is larger than the sum of its proper divisors (327694).

645362 is a wasteful number, since it uses less digits than its factorization.

645362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its digits is 4320, while the sum is 26.

The square root of 645362 is about 803.3442599534. The cubic root of 645362 is about 86.4173869044.

The spelling of 645362 in words is "six hundred forty-five thousand, three hundred sixty-two".