86721342 has 16 divisors (see below), whose sum is σ = 173592720. Its totient is φ = 28882112.

The previous prime is 86721329. The next prime is 86721343. The reversal of 86721342 is 24312768.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86721343) 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, 2128 + ... + 13340.

It is an arithmetic number, because the mean of its divisors is an integer number (10849545).

Almost surely, 2^86721342 is an apocalyptic number.

86721342 is an abundant number, since it is smaller than the sum of its proper divisors (86871378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86721342 is a wasteful number, since it uses less digits than its factorization.

86721342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12507.

The product of its digits is 16128, while the sum is 33.

The square root of 86721342 is about 9312.4294359743. The cubic root of 86721342 is about 442.6311730878.

The spelling of 86721342 in words is "eighty-six million, seven hundred twenty-one thousand, three hundred forty-two".