84285021 has 8 divisors (see below), whose sum is σ = 113802880. Its totient is φ = 55478592.

The previous prime is 84285017. The next prime is 84285037. The reversal of 84285021 is 12058248.

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

It is not a de Polignac number, because 84285021 - 2² = 84285017 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 84285021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84285011) 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, 177580 + ... + 178053.

It is an arithmetic number, because the mean of its divisors is an integer number (14225360).

Almost surely, 2^84285021 is an apocalyptic number.

It is an amenable number.

84285021 is a deficient number, since it is larger than the sum of its proper divisors (29517859).

84285021 is a wasteful number, since it uses less digits than its factorization.

84285021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355715.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 84285021 is about 9180.6873925649. The cubic root of 84285021 is about 438.4466940520.

The spelling of 84285021 in words is "eighty-four million, two hundred eighty-five thousand, twenty-one".