85805421 has 8 divisors (see below), whose sum is σ = 123207840. Its totient is φ = 52803312.

The previous prime is 85805389. The next prime is 85805449. The reversal of 85805421 is 12450858.

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

It is not a de Polignac number, because 85805421 - 2⁵ = 85805389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85805921) 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, 1100031 + ... + 1100108.

It is an arithmetic number, because the mean of its divisors is an integer number (15400980).

Almost surely, 2^85805421 is an apocalyptic number.

It is an amenable number.

85805421 is a deficient number, since it is larger than the sum of its proper divisors (37402419).

85805421 is a wasteful number, since it uses less digits than its factorization.

85805421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200155.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 85805421 is about 9263.1215580926. The cubic root of 85805421 is about 441.0673484793.

The spelling of 85805421 in words is "eighty-five million, eight hundred five thousand, four hundred twenty-one".