84642081 has 8 divisors (see below), whose sum is σ = 115608864. Its totient is φ = 55051680.

The previous prime is 84642073. The next prime is 84642091. The reversal of 84642081 is 18024648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84642081 - 2³ = 84642073 is a prime.

It is a super-2 number, since 2×84642081² = 14328563752021122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84642091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343951 + ... + 344196.

It is an arithmetic number, because the mean of its divisors is an integer number (14451108).

Almost surely, 2^84642081 is an apocalyptic number.

It is an amenable number.

84642081 is a deficient number, since it is larger than the sum of its proper divisors (30966783).

84642081 is a wasteful number, since it uses less digits than its factorization.

84642081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688191.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 84642081 is about 9200.1130971309. The cubic root of 84642081 is about 439.0649582255.

The spelling of 84642081 in words is "eighty-four million, six hundred forty-two thousand, eighty-one".