42021434 has 32 divisors (see below), whose sum is σ = 77911680. Its totient is φ = 16552512.

The previous prime is 42021401. The next prime is 42021509. The reversal of 42021434 is 43412024.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67577 + ... + 68195.

It is an arithmetic number, because the mean of its divisors is an integer number (2434740).

Almost surely, 2^42021434 is an apocalyptic number.

42021434 is a deficient number, since it is larger than the sum of its proper divisors (35890246).

42021434 is a wasteful number, since it uses less digits than its factorization.

42021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42021434 is about 6482.3941564826. The cubic root of 42021434 is about 347.6617855081.

Adding to 42021434 its reverse (43412024), we get a palindrome (85433458).

The spelling of 42021434 in words is "forty-two million, twenty-one thousand, four hundred thirty-four".