85242447 has 6 divisors (see below), whose sum is σ = 123127992. Its totient is φ = 56828292.

The previous prime is 85242431. The next prime is 85242461. The reversal of 85242447 is 74424258.

It is not a de Polignac number, because 85242447 - 2⁴ = 85242431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85241447) 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 5 ways as a sum of consecutive naturals, for example, 4735683 + ... + 4735700.

It is an arithmetic number, because the mean of its divisors is an integer number (20521332).

Almost surely, 2^85242447 is an apocalyptic number.

85242447 is a deficient number, since it is larger than the sum of its proper divisors (37885545).

85242447 is a wasteful number, since it uses less digits than its factorization.

85242447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9471389 (or 9471386 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 85242447 is about 9232.6836293680. The cubic root of 85242447 is about 440.1006088804.

The spelling of 85242447 in words is "eighty-five million, two hundred forty-two thousand, four hundred forty-seven".