42091443 has 6 divisors (see below), whose sum is σ = 60798764. Its totient is φ = 28060956.

The previous prime is 42091433. The next prime is 42091451. The reversal of 42091443 is 34419024.

It is not a de Polignac number, because 42091443 - 2⁵ = 42091411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42091433) 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 5 ways as a sum of consecutive naturals, for example, 2338405 + ... + 2338422.

Almost surely, 2^42091443 is an apocalyptic number.

42091443 is a deficient number, since it is larger than the sum of its proper divisors (18707321).

42091443 is a wasteful number, since it uses less digits than its factorization.

42091443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676833 (or 4676830 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 42091443 is about 6487.7918431466. The cubic root of 42091443 is about 347.8547501245.

The spelling of 42091443 in words is "forty-two million, ninety-one thousand, four hundred forty-three".