85287457 has 4 divisors (see below), whose sum is σ = 85315860. Its totient is φ = 85259056.

The previous prime is 85287437. The next prime is 85287467. The reversal of 85287457 is 75478258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75478258 = 2 ⋅37739129.

It can be written as a sum of positive squares in 2 ways, for example, as 83338641 + 1948816 = 9129^2 + 1396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85287457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85287437) 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, 9082 + ... + 15907.

It is an arithmetic number, because the mean of its divisors is an integer number (21328965).

Almost surely, 2^85287457 is an apocalyptic number.

It is an amenable number.

85287457 is a deficient number, since it is larger than the sum of its proper divisors (28403).

85287457 is a wasteful number, since it uses less digits than its factorization.

85287457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28402.

The product of its digits is 627200, while the sum is 46.

The square root of 85287457 is about 9235.1208438222. The cubic root of 85287457 is about 440.1780563791.

The spelling of 85287457 in words is "eighty-five million, two hundred eighty-seven thousand, four hundred fifty-seven".