859634 has 4 divisors (see below), whose sum is σ = 1289454. Its totient is φ = 429816.

The previous prime is 859633. The next prime is 859657. The reversal of 859634 is 436958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436958 = 2 ⋅218479.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 162409 = 835^2 + 403^2 .

It is a super-2 number, since 2×859634² = 1477941227912, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 859594 and 859603.

It is not an unprimeable number, because it can be changed into a prime (859633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214907 + ... + 214910.

2⁸⁵⁹⁶³⁴ is an apocalyptic number.

859634 is a deficient number, since it is larger than the sum of its proper divisors (429820).

859634 is a wasteful number, since it uses less digits than its factorization.

859634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429819.

The product of its digits is 25920, while the sum is 35.

The square root of 859634 is about 927.1644945747. The cubic root of 859634 is about 95.0833617324.

The spelling of 859634 in words is "eight hundred fifty-nine thousand, six hundred thirty-four".