42021436 has 12 divisors (see below), whose sum is σ = 74743480. Its totient is φ = 20666160.

The previous prime is 42021401. The next prime is 42021509. The reversal of 42021436 is 63412024.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85866 + ... + 86353.

Almost surely, 2^42021436 is an apocalyptic number.

It is an amenable number.

42021436 is a deficient number, since it is larger than the sum of its proper divisors (32722044).

42021436 is a wasteful number, since it uses less digits than its factorization.

42021436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172284 (or 172282 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42021436 is about 6482.3943107466. The cubic root of 42021436 is about 347.6617910238.

The spelling of 42021436 in words is "forty-two million, twenty-one thousand, four hundred thirty-six".