42123103 has 4 divisors (see below), whose sum is σ = 45952488. Its totient is φ = 38293720.

The previous prime is 42123091. The next prime is 42123119. The reversal of 42123103 is 30132124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42123103 - 2¹³ = 42114911 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42123173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914676 + ... + 1914697.

It is an arithmetic number, because the mean of its divisors is an integer number (11488122).

Almost surely, 2^42123103 is an apocalyptic number.

42123103 is a deficient number, since it is larger than the sum of its proper divisors (3829385).

42123103 is a wasteful number, since it uses less digits than its factorization.

42123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829384.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 42123103 is about 6490.2313518087. The cubic root of 42123103 is about 347.9419437876.

Adding to 42123103 its reverse (30132124), we get a palindrome (72255227).

The spelling of 42123103 in words is "forty-two million, one hundred twenty-three thousand, one hundred three".