630842 has 4 divisors (see below), whose sum is σ = 946266. Its totient is φ = 315420.

The previous prime is 630841. The next prime is 630863. The reversal of 630842 is 248036.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 410881 + 219961 = 641^2 + 469^2 .

It is not an unprimeable number, because it can be changed into a prime (630841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157709 + ... + 157712.

2⁶³⁰⁸⁴² is an apocalyptic number.

630842 is a deficient number, since it is larger than the sum of its proper divisors (315424).

630842 is a wasteful number, since it uses less digits than its factorization.

630842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315423.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 630842 is about 794.2556263572. The cubic root of 630842 is about 85.7643630654.

Adding to 630842 its reverse (248036), we get a palindrome (878878).

The spelling of 630842 in words is "six hundred thirty thousand, eight hundred forty-two".