86742081 has 6 divisors (see below), whose sum is σ = 125294130. Its totient is φ = 57828048.

The previous prime is 86742067. The next prime is 86742083. The reversal of 86742081 is 18024768.

It can be written as a sum of positive squares in only one way, i.e., 82519056 + 4223025 = 9084^2 + 2055^2 .

It is not a de Polignac number, because 86742081 - 2⁶ = 86742017 is a prime.

It is a super-2 number, since 2×86742081² = 15048377232421122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86742083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4818996 + ... + 4819013.

It is an arithmetic number, because the mean of its divisors is an integer number (20882355).

Almost surely, 2^86742081 is an apocalyptic number.

It is an amenable number.

86742081 is a deficient number, since it is larger than the sum of its proper divisors (38552049).

86742081 is a wasteful number, since it uses less digits than its factorization.

86742081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638015 (or 9638012 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 86742081 is about 9313.5428812026. The cubic root of 86742081 is about 442.6664546614. Note that the first 3 decimals are identical.

The spelling of 86742081 in words is "eighty-six million, seven hundred forty-two thousand, eighty-one".