42421233 has 4 divisors (see below), whose sum is σ = 56561648. Its totient is φ = 28280820.

The previous prime is 42421231. The next prime is 42421241. The reversal of 42421233 is 33212424.

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 not a de Polignac number, because 42421233 - 2¹ = 42421231 is a prime.

It is a super-2 number, since 2×42421233² = 3599122018480578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42421231) 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, 7070203 + ... + 7070208.

It is an arithmetic number, because the mean of its divisors is an integer number (14140412).

Almost surely, 2^42421233 is an apocalyptic number.

It is an amenable number.

42421233 is a deficient number, since it is larger than the sum of its proper divisors (14140415).

42421233 is a wasteful number, since it uses less digits than its factorization.

42421233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14140414.

The product of its digits is 1152, while the sum is 21.

The square root of 42421233 is about 6513.1584503987. The cubic root of 42421233 is about 348.7608781181.

Adding to 42421233 its reverse (33212424), we get a palindrome (75633657).

The spelling of 42421233 in words is "forty-two million, four hundred twenty-one thousand, two hundred thirty-three".