635575 has 6 divisors (see below), whose sum is σ = 788144. Its totient is φ = 508440.

The previous prime is 635567. The next prime is 635599. The reversal of 635575 is 575536.

It is not a de Polignac number, because 635575 - 2³ = 635567 is a prime.

It is a super-4 number, since 4×635575⁴ (a number of 24 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12687 + ... + 12736.

2⁶³⁵⁵⁷⁵ is an apocalyptic number.

635575 is a deficient number, since it is larger than the sum of its proper divisors (152569).

635575 is a wasteful number, since it uses less digits than its factorization.

635575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25433 (or 25428 counting only the distinct ones).

The product of its digits is 15750, while the sum is 31.

The square root of 635575 is about 797.2295779761. The cubic root of 635575 is about 85.9783161484.

The spelling of 635575 in words is "six hundred thirty-five thousand, five hundred seventy-five".