42421031 has 8 divisors (see below), whose sum is σ = 42865200. Its totient is φ = 41979520.

The previous prime is 42421021. The next prime is 42421033. The reversal of 42421031 is 13012424.

42421031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42421031 is a prime.

It is a super-2 number, since 2×42421031² = 3599087742205922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47711 + ... + 48591.

It is an arithmetic number, because the mean of its divisors is an integer number (5358150).

Almost surely, 2^42421031 is an apocalyptic number.

42421031 is a deficient number, since it is larger than the sum of its proper divisors (444169).

42421031 is a wasteful number, since it uses less digits than its factorization.

42421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42421031 is about 6513.1429433109. The cubic root of 42421031 is about 348.7603245446.

Adding to 42421031 its reverse (13012424), we get a palindrome (55433455).

The spelling of 42421031 in words is "forty-two million, four hundred twenty-one thousand, thirty-one".