42182421 has 4 divisors (see below), whose sum is σ = 56243232. Its totient is φ = 28121612.

The previous prime is 42182411. The next prime is 42182429. The reversal of 42182421 is 12428124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42182421 - 2¹¹ = 42180373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42182391 and 42182400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42182429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7030401 + ... + 7030406.

It is an arithmetic number, because the mean of its divisors is an integer number (14060808).

Almost surely, 2^42182421 is an apocalyptic number.

It is an amenable number.

42182421 is a deficient number, since it is larger than the sum of its proper divisors (14060811).

42182421 is a wasteful number, since it uses less digits than its factorization.

42182421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14060810.

The product of its digits is 1024, while the sum is 24.

The square root of 42182421 is about 6494.7995350126. The cubic root of 42182421 is about 348.1051918094.

The spelling of 42182421 in words is "forty-two million, one hundred eighty-two thousand, four hundred twenty-one".