630645 has 8 divisors (see below), whose sum is σ = 1009056. Its totient is φ = 336336.

The previous prime is 630613. The next prime is 630659. The reversal of 630645 is 546036.

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

It is not a de Polignac number, because 630645 - 2⁵ = 630613 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21007 + ... + 21036.

It is an arithmetic number, because the mean of its divisors is an integer number (126132).

2⁶³⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

630645 is a deficient number, since it is larger than the sum of its proper divisors (378411).

630645 is a wasteful number, since it uses less digits than its factorization.

630645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42051.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 630645 is about 794.1316011846. The cubic root of 630645 is about 85.7554346076.

It can be divided in two parts, 630 and 645, that added together give a triangular number (1275 = T₅₀).

The spelling of 630645 in words is "six hundred thirty thousand, six hundred forty-five".