42133421 has 16 divisors (see below), whose sum is σ = 47348928. Its totient is φ = 37161600.

The previous prime is 42133411. The next prime is 42133439. The reversal of 42133421 is 12433124.

It is a cyclic number.

It is not a de Polignac number, because 42133421 - 2¹⁰ = 42132397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42133393 and 42133402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42133411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132755 + ... + 133071.

It is an arithmetic number, because the mean of its divisors is an integer number (2959308).

Almost surely, 2^42133421 is an apocalyptic number.

It is an amenable number.

42133421 is a deficient number, since it is larger than the sum of its proper divisors (5215507).

42133421 is a wasteful number, since it uses less digits than its factorization.

42133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its digits is 576, while the sum is 20.

The square root of 42133421 is about 6491.0261900565. The cubic root of 42133421 is about 347.9703507791.

Adding to 42133421 its reverse (12433124), we get a palindrome (54566545).

The spelling of 42133421 in words is "forty-two million, one hundred thirty-three thousand, four hundred twenty-one".