85424245 has 4 divisors (see below), whose sum is σ = 102509100. Its totient is φ = 68339392.

The previous prime is 85424243. The next prime is 85424249. The reversal of 85424245 is 54242458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54242458 = 2 ⋅27121229.

It can be written as a sum of positive squares in 2 ways, for example, as 44169316 + 41254929 = 6646^2 + 6423^2 .

It is a cyclic number.

It is not a de Polignac number, because 85424245 - 2¹ = 85424243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85424245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85424243) 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, 8542420 + ... + 8542429.

It is an arithmetic number, because the mean of its divisors is an integer number (25627275).

Almost surely, 2^85424245 is an apocalyptic number.

It is an amenable number.

85424245 is a deficient number, since it is larger than the sum of its proper divisors (17084855).

85424245 is a wasteful number, since it uses less digits than its factorization.

85424245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17084854.

The product of its digits is 51200, while the sum is 34.

The square root of 85424245 is about 9242.5237354307. The cubic root of 85424245 is about 440.4132567120.

The spelling of 85424245 in words is "eighty-five million, four hundred twenty-four thousand, two hundred forty-five".