634571 has 8 divisors (see below), whose sum is σ = 730080. Its totient is φ = 540288.

The previous prime is 634567. The next prime is 634573. The reversal of 634571 is 175436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634571 - 2² = 634567 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634571.

It is not an unprimeable number, because it can be changed into a prime (634573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1715 + ... + 2051.

It is an arithmetic number, because the mean of its divisors is an integer number (91260).

2⁶³⁴⁵⁷¹ is an apocalyptic number.

634571 is a deficient number, since it is larger than the sum of its proper divisors (95509).

634571 is a wasteful number, since it uses less digits than its factorization.

634571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its digits is 2520, while the sum is 26.

The square root of 634571 is about 796.5996485061. The cubic root of 634571 is about 85.9330197775.

The spelling of 634571 in words is "six hundred thirty-four thousand, five hundred seventy-one".