630261 has 20 divisors (see below), whose sum is σ = 975744. Its totient is φ = 405000.

The previous prime is 630247. The next prime is 630263. The reversal of 630261 is 162036.

It is a happy number.

It is not a de Polignac number, because 630261 - 2⁵ = 630229 is a prime.

630261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630263) 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 19 ways as a sum of consecutive naturals, for example, 2386 + ... + 2636.

2⁶³⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

630261 is a deficient number, since it is larger than the sum of its proper divisors (345483).

630261 is a wasteful number, since it uses less digits than its factorization.

630261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 630261 is about 793.8897908400. The cubic root of 630261 is about 85.7380255671.

Adding to 630261 its reverse (162036), we get a palindrome (792297).

The spelling of 630261 in words is "six hundred thirty thousand, two hundred sixty-one".