858641 has 4 divisors (see below), whose sum is σ = 981312. Its totient is φ = 735972.

The previous prime is 858631. The next prime is 858673. The reversal of 858641 is 146858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 858641 - 2⁶ = 858577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 858598 and 858607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61325 + ... + 61338.

It is an arithmetic number, because the mean of its divisors is an integer number (245328).

2⁸⁵⁸⁶⁴¹ is an apocalyptic number.

It is an amenable number.

858641 is a deficient number, since it is larger than the sum of its proper divisors (122671).

858641 is a wasteful number, since it uses less digits than its factorization.

858641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122670.

The product of its digits is 7680, while the sum is 32.

The square root of 858641 is about 926.6288361583. The cubic root of 858641 is about 95.0467360068.

The spelling of 858641 in words is "eight hundred fifty-eight thousand, six hundred forty-one".