42021899 has 8 divisors (see below), whose sum is σ = 44646960. Its totient is φ = 39475296.

The previous prime is 42021883. The next prime is 42021907. The reversal of 42021899 is 99812024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42021899 - 2⁴ = 42021883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18509 + ... + 20654.

It is an arithmetic number, because the mean of its divisors is an integer number (5580870).

Almost surely, 2^42021899 is an apocalyptic number.

42021899 is a deficient number, since it is larger than the sum of its proper divisors (2625061).

42021899 is a wasteful number, since it uses less digits than its factorization.

42021899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39229.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 42021899 is about 6482.4300227615. The cubic root of 42021899 is about 347.6630678865.

The spelling of 42021899 in words is "forty-two million, twenty-one thousand, eight hundred ninety-nine".