630745 has 8 divisors (see below), whose sum is σ = 765000. Its totient is φ = 499200.

The previous prime is 630737. The next prime is 630797. The reversal of 630745 is 547036.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 447561 = 428^2 + 669^2 .

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

It is not a de Polignac number, because 630745 - 2³ = 630737 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 120 + ... + 1129.

It is an arithmetic number, because the mean of its divisors is an integer number (95625).

2⁶³⁰⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

630745 is a deficient number, since it is larger than the sum of its proper divisors (134255).

630745 is a wasteful number, since it uses less digits than its factorization.

630745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 630745 is about 794.1945605455. The cubic root of 630745 is about 85.7599670520.

The spelling of 630745 in words is "six hundred thirty thousand, seven hundred forty-five".