42133321 has 4 divisors (see below), whose sum is σ = 42260944. Its totient is φ = 42005700.

The previous prime is 42133313. The next prime is 42133331. The reversal of 42133321 is 12333124.

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 42133321 - 2³ = 42133313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42133331) 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, 63315 + ... + 63976.

It is an arithmetic number, because the mean of its divisors is an integer number (10565236).

Almost surely, 2^42133321 is an apocalyptic number.

It is an amenable number.

42133321 is a deficient number, since it is larger than the sum of its proper divisors (127623).

42133321 is a wasteful number, since it uses less digits than its factorization.

42133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127622.

The product of its digits is 432, while the sum is 19.

The square root of 42133321 is about 6491.0184871097. The cubic root of 42133321 is about 347.9700754865.

Adding to 42133321 its reverse (12333124), we get a palindrome (54466445).

The spelling of 42133321 in words is "forty-two million, one hundred thirty-three thousand, three hundred twenty-one".