85161742 has 4 divisors (see below), whose sum is σ = 127742616. Its totient is φ = 42580870.

The previous prime is 85161707. The next prime is 85161751. The reversal of 85161742 is 24716158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24716158 = 2 ⋅12358079.

It is a junction number, because it is equal to n+sod(n) for n = 85161698 and 85161707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21290434 + ... + 21290437.

It is an arithmetic number, because the mean of its divisors is an integer number (31935654).

Almost surely, 2^85161742 is an apocalyptic number.

85161742 is a deficient number, since it is larger than the sum of its proper divisors (42580874).

85161742 is a wasteful number, since it uses less digits than its factorization.

85161742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42580873.

The product of its digits is 13440, while the sum is 34.

The square root of 85161742 is about 9228.3119799885. The cubic root of 85161742 is about 439.9616736589.

The spelling of 85161742 in words is "eighty-five million, one hundred sixty-one thousand, seven hundred forty-two".