634512 has 20 divisors (see below), whose sum is σ = 1639280. Its totient is φ = 211488.

The previous prime is 634511. The next prime is 634519. The reversal of 634512 is 215436.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (634511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6562 + ... + 6657.

It is an arithmetic number, because the mean of its divisors is an integer number (81964).

2⁶³⁴⁵¹² is an apocalyptic number.

It is an amenable number.

634512 is an abundant number, since it is smaller than the sum of its proper divisors (1004768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634512 is a wasteful number, since it uses less digits than its factorization.

634512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230 (or 13224 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 634512 is about 796.5626152413. The cubic root of 634512 is about 85.9303564530.

Adding to 634512 its reverse (215436), we get a palindrome (849948).

The spelling of 634512 in words is "six hundred thirty-four thousand, five hundred twelve".