42321421 has 8 divisors (see below), whose sum is σ = 43153344. Its totient is φ = 41495520.

The previous prime is 42321413. The next prime is 42321427. The reversal of 42321421 is 12412324.

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 42321421 - 2³ = 42321413 is a prime.

It is a super-2 number, since 2×42321421² = 3582205350918482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42321427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14256 + ... + 16966.

It is an arithmetic number, because the mean of its divisors is an integer number (5394168).

Almost surely, 2^42321421 is an apocalyptic number.

It is an amenable number.

42321421 is a deficient number, since it is larger than the sum of its proper divisors (831923).

42321421 is a wasteful number, since it uses less digits than its factorization.

42321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011.

The product of its digits is 384, while the sum is 19.

The square root of 42321421 is about 6505.4916032534. The cubic root of 42321421 is about 348.4871326712.

Adding to 42321421 its reverse (12412324), we get a palindrome (54733745).

The spelling of 42321421 in words is "forty-two million, three hundred twenty-one thousand, four hundred twenty-one".