42034021 has 12 divisors (see below), whose sum is σ = 43954144. Its totient is φ = 40194000.

The previous prime is 42034007. The next prime is 42034037. The reversal of 42034021 is 12043024.

It is not a de Polignac number, because 42034021 - 2⁵ = 42033989 is a prime.

It is a Duffinian number.

42034021 is a Rhonda number in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 42033986 and 42034004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42034001) 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 11 ways as a sum of consecutive naturals, for example, 126826 + ... + 127156.

Almost surely, 2^42034021 is an apocalyptic number.

It is an amenable number.

42034021 is a deficient number, since it is larger than the sum of its proper divisors (1920123).

42034021 is a wasteful number, since it uses less digits than its factorization.

42034021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42034021 is about 6483.3649442246. The cubic root of 42034021 is about 347.6964946365.

Adding to 42034021 its reverse (12043024), we get a palindrome (54077045).

The spelling of 42034021 in words is "forty-two million, thirty-four thousand, twenty-one".