84421005 has 32 divisors (see below), whose sum is σ = 138184704. Its totient is φ = 43999296.

The previous prime is 84421003. The next prime is 84421021. The reversal of 84421005 is 50012448.

It is not a de Polignac number, because 84421005 - 2¹ = 84421003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84421003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167584 + ... + 168086.

It is an arithmetic number, because the mean of its divisors is an integer number (4318272).

Almost surely, 2^84421005 is an apocalyptic number.

It is an amenable number.

84421005 is a deficient number, since it is larger than the sum of its proper divisors (53763699).

84421005 is a wasteful number, since it uses less digits than its factorization.

84421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 84421005 is about 9188.0903891940. The cubic root of 84421005 is about 438.6823614696.

The spelling of 84421005 in words is "eighty-four million, four hundred twenty-one thousand, five".