85212497 has 4 divisors (see below), whose sum is σ = 85252260. Its totient is φ = 85172736.

The previous prime is 85212451. The next prime is 85212557. The reversal of 85212497 is 79421258.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77862976 + 7349521 = 8824^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 85212497 - 2⁶ = 85212433 is a prime.

It is a super-2 number, since 2×85212497² = 14522339289950018, 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 85212497.

It is not an unprimeable number, because it can be changed into a prime (85212997) 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, 16472 + ... + 21017.

It is an arithmetic number, because the mean of its divisors is an integer number (21313065).

Almost surely, 2^85212497 is an apocalyptic number.

It is an amenable number.

85212497 is a deficient number, since it is larger than the sum of its proper divisors (39763).

85212497 is a wasteful number, since it uses less digits than its factorization.

85212497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39762.

The product of its digits is 40320, while the sum is 38.

The square root of 85212497 is about 9231.0615315900. The cubic root of 85212497 is about 440.0490596123.

The spelling of 85212497 in words is "eighty-five million, two hundred twelve thousand, four hundred ninety-seven".