85442547 has 8 divisors (see below), whose sum is σ = 115098256. Its totient is φ = 56374272.

The previous prime is 85442537. The next prime is 85442549. The reversal of 85442547 is 74524458.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85442547 - 2⁴ = 85442531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85442549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146518 + ... + 147099.

It is an arithmetic number, because the mean of its divisors is an integer number (14387282).

Almost surely, 2^85442547 is an apocalyptic number.

85442547 is a deficient number, since it is larger than the sum of its proper divisors (29655709).

85442547 is a wasteful number, since it uses less digits than its factorization.

85442547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293717.

The product of its digits is 179200, while the sum is 39.

The square root of 85442547 is about 9243.5137799432. The cubic root of 85442547 is about 440.4447070645. Note that the first 3 decimals are identical.

The spelling of 85442547 in words is "eighty-five million, four hundred forty-two thousand, five hundred forty-seven".