86642745 has 32 divisors (see below), whose sum is σ = 159667200. Its totient is φ = 39299520.

The previous prime is 86642741. The next prime is 86642747. The reversal of 86642745 is 54724668.

It is not a de Polignac number, because 86642745 - 2² = 86642741 is a prime.

It is a super-2 number, since 2×86642745² = 15013930522270050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86642697 and 86642706.

It is not an unprimeable number, because it can be changed into a prime (86642741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10606 + ... + 16904.

It is an arithmetic number, because the mean of its divisors is an integer number (4989600).

Almost surely, 2^86642745 is an apocalyptic number.

It is an amenable number.

86642745 is a deficient number, since it is larger than the sum of its proper divisors (73024455).

86642745 is a wasteful number, since it uses less digits than its factorization.

86642745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445.

The product of its digits is 322560, while the sum is 42.

The square root of 86642745 is about 9308.2084742447. The cubic root of 86642745 is about 442.4974113290.

The spelling of 86642745 in words is "eighty-six million, six hundred forty-two thousand, seven hundred forty-five".