85667421 has 32 divisors (see below), whose sum is σ = 136028160. Its totient is φ = 46920384.

The previous prime is 85667411. The next prime is 85667423. The reversal of 85667421 is 12476658.

It is not a de Polignac number, because 85667421 - 2⁹ = 85666909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85667421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85667423) 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, 98836 + ... + 99698.

It is an arithmetic number, because the mean of its divisors is an integer number (4250880).

Almost surely, 2^85667421 is an apocalyptic number.

It is an amenable number.

85667421 is a deficient number, since it is larger than the sum of its proper divisors (50360739).

85667421 is a wasteful number, since it uses less digits than its factorization.

85667421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065.

The product of its digits is 80640, while the sum is 39.

The square root of 85667421 is about 9255.6696678306. The cubic root of 85667421 is about 440.8307668690.

The spelling of 85667421 in words is "eighty-five million, six hundred sixty-seven thousand, four hundred twenty-one".