42078503 has 8 divisors (see below), whose sum is σ = 42662928. Its totient is φ = 41497344.

The previous prime is 42078457. The next prime is 42078511. The reversal of 42078503 is 30587024.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42078503 - 2¹⁰ = 42077479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42078403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35600 + ... + 36762.

It is an arithmetic number, because the mean of its divisors is an integer number (5332866).

Almost surely, 2^42078503 is an apocalyptic number.

42078503 is a deficient number, since it is larger than the sum of its proper divisors (584425).

42078503 is a wasteful number, since it uses less digits than its factorization.

42078503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 42078503 is about 6486.7945088464. The cubic root of 42078503 is about 347.8190999505.

It can be divided in two parts, 420 and 78503, that multiplied together give a triangular number (32971260 = T₈₁₂₀).

The spelling of 42078503 in words is "forty-two million, seventy-eight thousand, five hundred three".