85342321 has 4 divisors (see below), whose sum is σ = 85562100. Its totient is φ = 85122544.

The previous prime is 85342307. The next prime is 85342337. The reversal of 85342321 is 12324358.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12324358 = 2 ⋅6162179.

It can be written as a sum of positive squares in 2 ways, for example, as 35569296 + 49773025 = 5964^2 + 7055^2 .

It is a cyclic number.

It is not a de Polignac number, because 85342321 - 2⁵ = 85342289 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 85342321.

It is not an unprimeable number, because it can be changed into a prime (85342391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109306 + ... + 110083.

It is an arithmetic number, because the mean of its divisors is an integer number (21390525).

Almost surely, 2^85342321 is an apocalyptic number.

It is an amenable number.

85342321 is a deficient number, since it is larger than the sum of its proper divisors (219779).

85342321 is a wasteful number, since it uses less digits than its factorization.

85342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219778.

The product of its digits is 5760, while the sum is 28.

The square root of 85342321 is about 9238.0907659538. The cubic root of 85342321 is about 440.2724225503.

Adding to 85342321 its reverse (12324358), we get a palindrome (97666679).

The spelling of 85342321 in words is "eighty-five million, three hundred forty-two thousand, three hundred twenty-one".