85711457 has 8 divisors (see below), whose sum is σ = 92588160. Its totient is φ = 78875280.

The previous prime is 85711453. The next prime is 85711469. The reversal of 85711457 is 75411758.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85711457 - 2² = 85711453 is a prime.

It is a super-2 number, since 2×85711457² = 14692907722125698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85711457.

It is not an unprimeable number, because it can be changed into a prime (85711453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5657 + ... + 14262.

It is an arithmetic number, because the mean of its divisors is an integer number (11573520).

Almost surely, 2^85711457 is an apocalyptic number.

It is an amenable number.

85711457 is a deficient number, since it is larger than the sum of its proper divisors (6876703).

85711457 is a wasteful number, since it uses less digits than its factorization.

85711457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20263.

The product of its digits is 39200, while the sum is 38.

The square root of 85711457 is about 9258.0482284335. The cubic root of 85711457 is about 440.9062879875.

It can be divided in two parts, 85711 and 457, that added together give a palindrome (86168).

The spelling of 85711457 in words is "eighty-five million, seven hundred eleven thousand, four hundred fifty-seven".