42301821 has 16 divisors (see below), whose sum is σ = 57435840. Its totient is φ = 27688320.

The previous prime is 42301813. The next prime is 42301823. The reversal of 42301821 is 12810324.

It is not a de Polignac number, because 42301821 - 2³ = 42301813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42301823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91531 + ... + 91991.

It is an arithmetic number, because the mean of its divisors is an integer number (3589740).

Almost surely, 2^42301821 is an apocalyptic number.

It is an amenable number.

42301821 is a deficient number, since it is larger than the sum of its proper divisors (15134019).

42301821 is a wasteful number, since it uses less digits than its factorization.

42301821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 42301821 is about 6503.9850092078. The cubic root of 42301821 is about 348.4333269597.

The spelling of 42301821 in words is "forty-two million, three hundred one thousand, eight hundred twenty-one".