85043421 has 12 divisors (see below), whose sum is σ = 124396480. Its totient is φ = 55977480.

The previous prime is 85043419. The next prime is 85043423. The reversal of 85043421 is 12434058.

It is an interprime number because it is at equal distance from previous prime (85043419) and next prime (85043423).

It is not a de Polignac number, because 85043421 - 2¹ = 85043419 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 (85043423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59095 + ... + 60516.

Almost surely, 2^85043421 is an apocalyptic number.

It is an amenable number.

85043421 is a deficient number, since it is larger than the sum of its proper divisors (39353059).

85043421 is a wasteful number, since it uses less digits than its factorization.

85043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119696 (or 119693 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 85043421 is about 9221.8989909888. The cubic root of 85043421 is about 439.7578229969.

Adding to 85043421 its reverse (12434058), we get a palindrome (97477479).

The spelling of 85043421 in words is "eighty-five million, forty-three thousand, four hundred twenty-one".