85206421 has 8 divisors (see below), whose sum is σ = 89014464. Its totient is φ = 81407040.

The previous prime is 85206419. The next prime is 85206463. The reversal of 85206421 is 12460258.

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

It is a cyclic number.

It is not a de Polignac number, because 85206421 - 2¹ = 85206419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85206421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85206481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25741 + ... + 28861.

It is an arithmetic number, because the mean of its divisors is an integer number (11126808).

Almost surely, 2^85206421 is an apocalyptic number.

It is an amenable number.

85206421 is a deficient number, since it is larger than the sum of its proper divisors (3808043).

85206421 is a wasteful number, since it uses less digits than its factorization.

85206421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4331.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 85206421 is about 9230.7324194779. The cubic root of 85206421 is about 440.0386002637.

Adding to 85206421 its reverse (12460258), we get a palindrome (97666679).

It can be divided in two parts, 8520 and 6421, that added together give a palindrome (14941).

The spelling of 85206421 in words is "eighty-five million, two hundred six thousand, four hundred twenty-one".