42103421 has 4 divisors (see below), whose sum is σ = 42435072. Its totient is φ = 41771772.

The previous prime is 42103417. The next prime is 42103427. The reversal of 42103421 is 12430124.

42103421 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42103421 - 2² = 42103417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42103421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42103427) 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, 165635 + ... + 165888.

It is an arithmetic number, because the mean of its divisors is an integer number (10608768).

Almost surely, 2^42103421 is an apocalyptic number.

It is an amenable number.

42103421 is a deficient number, since it is larger than the sum of its proper divisors (331651).

42103421 is a wasteful number, since it uses less digits than its factorization.

42103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331650.

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

The square root of 42103421 is about 6488.7148958788. The cubic root of 42103421 is about 347.8877434420.

Adding to 42103421 its reverse (12430124), we get a palindrome (54533545).

It can be divided in two parts, 42103 and 421, that added together give a palindrome (42524).

The spelling of 42103421 in words is "forty-two million, one hundred three thousand, four hundred twenty-one".