85734221 has 4 divisors (see below), whose sum is σ = 85800444. Its totient is φ = 85668000.

The previous prime is 85734211. The next prime is 85734223. The reversal of 85734221 is 12243758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12243758 = 2 ⋅6121879.

It can be written as a sum of positive squares in 2 ways, for example, as 76650025 + 9084196 = 8755^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 85734221 - 2¹⁴ = 85717837 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 (85734223) 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 3 ways as a sum of consecutive naturals, for example, 31130 + ... + 33771.

It is an arithmetic number, because the mean of its divisors is an integer number (21450111).

Almost surely, 2^85734221 is an apocalyptic number.

It is an amenable number.

85734221 is a deficient number, since it is larger than the sum of its proper divisors (66223).

85734221 is a wasteful number, since it uses less digits than its factorization.

85734221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66222.

The product of its digits is 13440, while the sum is 32.

The square root of 85734221 is about 9259.2775636115. The cubic root of 85734221 is about 440.9453177846.

Adding to 85734221 its reverse (12243758), we get a palindrome (97977979).

The spelling of 85734221 in words is "eighty-five million, seven hundred thirty-four thousand, two hundred twenty-one".