42391103 has 4 divisors (see below), whose sum is σ = 42405720. Its totient is φ = 42376488.

The previous prime is 42391091. The next prime is 42391121. The reversal of 42391103 is 30119324.

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 42391103 - 2¹⁶ = 42325567 is a prime.

It is a super-2 number, since 2×42391103² = 3594011227113218, 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 (42391123) 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, 1325 + ... + 9302.

It is an arithmetic number, because the mean of its divisors is an integer number (10601430).

Almost surely, 2^42391103 is an apocalyptic number.

42391103 is a deficient number, since it is larger than the sum of its proper divisors (14617).

42391103 is a wasteful number, since it uses less digits than its factorization.

42391103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14616.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 42391103 is about 6510.8450296409. The cubic root of 42391103 is about 348.6782885489.

The spelling of 42391103 in words is "forty-two million, three hundred ninety-one thousand, one hundred three".