86142421 has 4 divisors (see below), whose sum is σ = 86177344. Its totient is φ = 86107500.

The previous prime is 86142391. The next prime is 86142439. The reversal of 86142421 is 12424168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86142421 - 2¹⁹ = 85618133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86142421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86142461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13455 + ... + 18796.

It is an arithmetic number, because the mean of its divisors is an integer number (21544336).

Almost surely, 2^86142421 is an apocalyptic number.

It is an amenable number.

86142421 is a deficient number, since it is larger than the sum of its proper divisors (34923).

86142421 is a wasteful number, since it uses less digits than its factorization.

86142421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34922.

The product of its digits is 3072, while the sum is 28.

The square root of 86142421 is about 9281.2941446762. The cubic root of 86142421 is about 441.6440234901.

Adding to 86142421 its reverse (12424168), we get a palindrome (98566589).

The spelling of 86142421 in words is "eighty-six million, one hundred forty-two thousand, four hundred twenty-one".