858401 has 4 divisors (see below), whose sum is σ = 903600. Its totient is φ = 813204.

The previous prime is 858397. The next prime is 858427. The reversal of 858401 is 104858.

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 858401 - 2² = 858397 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 858401.

It is not an unprimeable number, because it can be changed into a prime (858001) 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, 22571 + ... + 22608.

It is an arithmetic number, because the mean of its divisors is an integer number (225900).

2⁸⁵⁸⁴⁰¹ is an apocalyptic number.

It is an amenable number.

858401 is a deficient number, since it is larger than the sum of its proper divisors (45199).

858401 is a wasteful number, since it uses less digits than its factorization.

858401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45198.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 858401 is about 926.4993254180. The cubic root of 858401 is about 95.0378796310.

The spelling of 858401 in words is "eight hundred fifty-eight thousand, four hundred one".