42984121 has 8 divisors (see below), whose sum is σ = 44242184. Its totient is φ = 41731200.

The previous prime is 42984107. The next prime is 42984157. The reversal of 42984121 is 12148924.

It can be written as a sum of positive squares in 4 ways, for example, as 26378496 + 16605625 = 5136^2 + 4075^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42984121 - 2⁵ = 42984089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42984421) 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, 21271 + ... + 23203.

It is an arithmetic number, because the mean of its divisors is an integer number (5530273).

Almost surely, 2^42984121 is an apocalyptic number.

It is an amenable number.

42984121 is a deficient number, since it is larger than the sum of its proper divisors (1258063).

42984121 is a wasteful number, since it uses less digits than its factorization.

42984121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its digits is 4608, while the sum is 31.

The square root of 42984121 is about 6556.2276501049. The cubic root of 42984121 is about 350.2966763434.

The spelling of 42984121 in words is "forty-two million, nine hundred eighty-four thousand, one hundred twenty-one".