634455 has 24 divisors (see below), whose sum is σ = 1149408. Its totient is φ = 323136.

The previous prime is 634441. The next prime is 634471. The reversal of 634455 is 554436.

It is not a de Polignac number, because 634455 - 2⁷ = 634327 is a prime.

634455 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 729 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (47892).

2⁶³⁴⁴⁵⁵ is an apocalyptic number.

634455 is a deficient number, since it is larger than the sum of its proper divisors (514953).

634455 is a wasteful number, since it uses less digits than its factorization.

634455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 644 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 634455 is about 796.5268357061. The cubic root of 634455 is about 85.9277832540.

It can be divided in two parts, 634 and 455, that added together give a square (1089 = 33²).

The spelling of 634455 in words is "six hundred thirty-four thousand, four hundred fifty-five".