645962 has 16 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 300960.

The previous prime is 645941. The next prime is 645973. The reversal of 645962 is 269546.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645962.

It is an unprimeable number.

645962 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 3287 + ... + 3477.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2⁶⁴⁵⁹⁶² is an apocalyptic number.

645962 is a deficient number, since it is larger than the sum of its proper divisors (390838).

645962 is a wasteful number, since it uses less digits than its factorization.

645962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its digits is 12960, while the sum is 32.

The square root of 645962 is about 803.7176121002. The cubic root of 645962 is about 86.4441596675. Note that the first 3 decimals are identical.

The spelling of 645962 in words is "six hundred forty-five thousand, nine hundred sixty-two".