634401 has 6 divisors (see below), whose sum is σ = 916370. Its totient is φ = 422928.

The previous prime is 634397. The next prime is 634421. The reversal of 634401 is 104436.

It can be written as a sum of positive squares in only one way, i.e., 389376 + 245025 = 624^2 + 495^2 .

It is not a de Polignac number, because 634401 - 2² = 634397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (634421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35236 + ... + 35253.

2⁶³⁴⁴⁰¹ is an apocalyptic number.

It is an amenable number.

634401 is a deficient number, since it is larger than the sum of its proper divisors (281969).

634401 is a wasteful number, since it uses less digits than its factorization.

634401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70495 (or 70492 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 634401 is about 796.4929378218. The cubic root of 634401 is about 85.9253453443.

Adding to 634401 its reverse (104436), we get a palindrome (738837).

It can be divided in two parts, 634 and 401, that added together give a triangular number (1035 = T₄₅).

The spelling of 634401 in words is "six hundred thirty-four thousand, four hundred one".