630615 has 16 divisors (see below), whose sum is σ = 1068768. Its totient is φ = 316416.

The previous prime is 630613. The next prime is 630659. The reversal of 630615 is 516036.

It is not a de Polignac number, because 630615 - 2¹ = 630613 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 630591 and 630600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630613) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 982 + ... + 1491.

It is an arithmetic number, because the mean of its divisors is an integer number (66798).

2⁶³⁰⁶¹⁵ is an apocalyptic number.

630615 is a deficient number, since it is larger than the sum of its proper divisors (438153).

630615 is a wasteful number, since it uses less digits than its factorization.

630615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 630615 is about 794.1127124030. The cubic root of 630615 is about 85.7540747808.

The spelling of 630615 in words is "six hundred thirty thousand, six hundred fifteen".