642586 has 24 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 268632.

The previous prime is 642581. The next prime is 642613. The reversal of 642586 is 685246.

642586 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7701 + ... + 7783.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁶⁴²⁵⁸⁶ is an apocalyptic number.

642586 is a deficient number, since it is larger than the sum of its proper divisors (506534).

642586 is a wasteful number, since it uses less digits than its factorization.

642586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 171 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 642586 is about 801.6146206251. The cubic root of 642586 is about 86.2933017882.

The spelling of 642586 in words is "six hundred forty-two thousand, five hundred eighty-six".