630251 has 4 divisors (see below), whose sum is σ = 644952. Its totient is φ = 615552.

The previous prime is 630247. The next prime is 630263. The reversal of 630251 is 152036.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 630251 - 2² = 630247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (630281) 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 3 ways as a sum of consecutive naturals, for example, 7286 + ... + 7371.

It is an arithmetic number, because the mean of its divisors is an integer number (161238).

2⁶³⁰²⁵¹ is an apocalyptic number.

630251 is a deficient number, since it is larger than the sum of its proper divisors (14701).

630251 is a wasteful number, since it uses less digits than its factorization.

630251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14700.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 630251 is about 793.8834927116. The cubic root of 630251 is about 85.7375721123.

Adding to 630251 its reverse (152036), we get a palindrome (782287).

The spelling of 630251 in words is "six hundred thirty thousand, two hundred fifty-one".