84312405 has 48 divisors (see below), whose sum is σ = 158845440. Its totient is φ = 41212800.

The previous prime is 84312383. The next prime is 84312409. The reversal of 84312405 is 50421348.

It is not a de Polignac number, because 84312405 - 2⁵ = 84312373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84312409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24915 + ... + 28095.

It is an arithmetic number, because the mean of its divisors is an integer number (3309280).

Almost surely, 2^84312405 is an apocalyptic number.

It is an amenable number.

84312405 is a deficient number, since it is larger than the sum of its proper divisors (74533035).

84312405 is a wasteful number, since it uses less digits than its factorization.

84312405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242 (or 3239 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84312405 is about 9182.1786630407. The cubic root of 84312405 is about 438.4941723349.

The spelling of 84312405 in words is "eighty-four million, three hundred twelve thousand, four hundred five".