42241021 has 8 divisors (see below), whose sum is σ = 43294784. Its totient is φ = 41199840.

The previous prime is 42240977. The next prime is 42241027. The reversal of 42241021 is 12014224.

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 42241021 - 2⁷ = 42240893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42240986 and 42241004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42241027) 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, 3841 + ... + 9961.

It is an arithmetic number, because the mean of its divisors is an integer number (5411848).

Almost surely, 2^42241021 is an apocalyptic number.

It is an amenable number.

42241021 is a deficient number, since it is larger than the sum of its proper divisors (1053763).

42241021 is a wasteful number, since it uses less digits than its factorization.

42241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 42241021 is about 6499.3092709918. The cubic root of 42241021 is about 348.2663136300.

Adding to 42241021 its reverse (12014224), we get a palindrome (54255245).

The spelling of 42241021 in words is "forty-two million, two hundred forty-one thousand, twenty-one".