85136258 has 4 divisors (see below), whose sum is σ = 127704390. Its totient is φ = 42568128.

The previous prime is 85136251. The next prime is 85136267. The reversal of 85136258 is 85263158.

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

It can be written as a sum of positive squares in only one way, i.e., 82755409 + 2380849 = 9097^2 + 1543^2 .

It is not an unprimeable number, because it can be changed into a prime (85136251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21284063 + ... + 21284066.

Almost surely, 2^85136258 is an apocalyptic number.

85136258 is a deficient number, since it is larger than the sum of its proper divisors (42568132).

85136258 is a wasteful number, since it uses less digits than its factorization.

85136258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42568131.

The product of its digits is 57600, while the sum is 38.

The square root of 85136258 is about 9226.9311257861. The cubic root of 85136258 is about 439.9177842254.

The spelling of 85136258 in words is "eighty-five million, one hundred thirty-six thousand, two hundred fifty-eight".