634545 has 24 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 331296.

The previous prime is 634541. The next prime is 634567. The reversal of 634545 is 545436.

It is not a de Polignac number, because 634545 - 2² = 634541 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

634545 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634541) 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 23 ways as a sum of consecutive naturals, for example, 2536 + ... + 2774.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2⁶³⁴⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

634545 is a deficient number, since it is larger than the sum of its proper divisors (488655).

634545 is a wasteful number, since it uses less digits than its factorization.

634545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 306 counting only the distinct ones).

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

The square root of 634545 is about 796.5833289744. The cubic root of 634545 is about 85.9318461294.

The spelling of 634545 in words is "six hundred thirty-four thousand, five hundred forty-five".