85000421 has 32 divisors (see below), whose sum is σ = 100759680. Its totient is φ = 70963200.

The previous prime is 85000411. The next prime is 85000423. The reversal of 85000421 is 12400058.

It is a de Polignac number, because none of the positive numbers 2^k-85000421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85000393 and 85000402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85000423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 876245 + ... + 876341.

It is an arithmetic number, because the mean of its divisors is an integer number (3148740).

Almost surely, 2^85000421 is an apocalyptic number.

It is an amenable number.

85000421 is a deficient number, since it is larger than the sum of its proper divisors (15759259).

85000421 is a wasteful number, since it uses less digits than its factorization.

85000421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 85000421 is about 9219.5672891953. The cubic root of 85000421 is about 439.6836931226.

Adding to 85000421 its reverse (12400058), we get a palindrome (97400479).

The spelling of 85000421 in words is "eighty-five million, four hundred twenty-one", and thus it is an aban number.