86121081 has 24 divisors (see below), whose sum is σ = 127747776. Its totient is φ = 55887840.

The previous prime is 86121073. The next prime is 86121107. The reversal of 86121081 is 18012168.

It is not a de Polignac number, because 86121081 - 2³ = 86121073 is a prime.

It is a super-2 number, since 2×86121081² = 14833681185217122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86121001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55786 + ... + 57308.

It is an arithmetic number, because the mean of its divisors is an integer number (5322824).

Almost surely, 2^86121081 is an apocalyptic number.

It is an amenable number.

86121081 is a deficient number, since it is larger than the sum of its proper divisors (41626695).

86121081 is a wasteful number, since it uses less digits than its factorization.

86121081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1690 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 86121081 is about 9280.1444493068. The cubic root of 86121081 is about 441.6075510927.

The spelling of 86121081 in words is "eighty-six million, one hundred twenty-one thousand, eighty-one".