634481 has 4 divisors (see below), whose sum is σ = 641700. Its totient is φ = 627264.

The previous prime is 634471. The next prime is 634483. The reversal of 634481 is 184436.

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

It can be written as a sum of positive squares in 2 ways, for example, as 255025 + 379456 = 505^2 + 616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634481 is a prime.

It is a super-2 number, since 2×634481² = 805132278722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 634481.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 634481.

It is not an unprimeable number, because it can be changed into a prime (634483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3476 + ... + 3653.

It is an arithmetic number, because the mean of its divisors is an integer number (160425).

2⁶³⁴⁴⁸¹ is an apocalyptic number.

It is an amenable number.

634481 is a deficient number, since it is larger than the sum of its proper divisors (7219).

634481 is an equidigital number, since it uses as much as digits as its factorization.

634481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7218.

The product of its digits is 2304, while the sum is 26.

The square root of 634481 is about 796.5431563952. The cubic root of 634481 is about 85.9289570130.

The spelling of 634481 in words is "six hundred thirty-four thousand, four hundred eighty-one".