85225421 has 8 divisors (see below), whose sum is σ = 86519160. Its totient is φ = 83939328.

The previous prime is 85225411. The next prime is 85225447. The reversal of 85225421 is 12452258.

It can be written as a sum of positive squares in 4 ways, for example, as 6708100 + 78517321 = 2590^2 + 8861^2 .

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 85225421 - 2¹⁰ = 85224397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85225411) 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, 22925 + ... + 26381.

It is an arithmetic number, because the mean of its divisors is an integer number (10814895).

Almost surely, 2^85225421 is an apocalyptic number.

It is an amenable number.

85225421 is a deficient number, since it is larger than the sum of its proper divisors (1293739).

85225421 is a wasteful number, since it uses less digits than its factorization.

85225421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823.

The product of its digits is 6400, while the sum is 29.

The square root of 85225421 is about 9231.7615328820. The cubic root of 85225421 is about 440.0713055925.

Adding to 85225421 its reverse (12452258), we get a palindrome (97677679).

The spelling of 85225421 in words is "eighty-five million, two hundred twenty-five thousand, four hundred twenty-one".