42313421 has 4 divisors (see below), whose sum is σ = 42326652. Its totient is φ = 42300192.

The previous prime is 42313417. The next prime is 42313441. The reversal of 42313421 is 12431324.

42313421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2937796 + 39375625 = 1714^2 + 6275^2 .

It is a cyclic number.

It is not a de Polignac number, because 42313421 - 2² = 42313417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42313393 and 42313402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42313441) 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 3 ways as a sum of consecutive naturals, for example, 1505 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (10581663).

Almost surely, 2^42313421 is an apocalyptic number.

It is an amenable number.

42313421 is a deficient number, since it is larger than the sum of its proper divisors (13231).

42313421 is an equidigital number, since it uses as much as digits as its factorization.

42313421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230.

The product of its digits is 576, while the sum is 20.

The square root of 42313421 is about 6504.8767090545. The cubic root of 42313421 is about 348.4651731632.

Adding to 42313421 its reverse (12431324), we get a palindrome (54744745).

The spelling of 42313421 in words is "forty-two million, three hundred thirteen thousand, four hundred twenty-one".