42421284 has 18 divisors (see below), whose sum is σ = 107231670. Its totient is φ = 14140416.

The previous prime is 42421283. The next prime is 42421289. The reversal of 42421284 is 48212424.

It can be written as a sum of positive squares in only one way, i.e., 40678884 + 1742400 = 6378^2 + 1320^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (42421283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589149 + ... + 589220.

It is an arithmetic number, because the mean of its divisors is an integer number (5957315).

Almost surely, 2^42421284 is an apocalyptic number.

It is an amenable number.

42421284 is an abundant number, since it is smaller than the sum of its proper divisors (64810386).

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

42421284 is a wasteful number, since it uses less digits than its factorization.

42421284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178379 (or 1178374 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 42421284 is about 6513.1623655487. The cubic root of 42421284 is about 348.7610178814.

The spelling of 42421284 in words is "forty-two million, four hundred twenty-one thousand, two hundred eighty-four".