42520503 has 4 divisors (see below), whose sum is σ = 56694008. Its totient is φ = 28347000.

The previous prime is 42520501. The next prime is 42520523. The reversal of 42520503 is 30502524.

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

It is not a de Polignac number, because 42520503 - 2¹ = 42520501 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 42520503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520501) 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, 7086748 + ... + 7086753.

It is an arithmetic number, because the mean of its divisors is an integer number (14173502).

Almost surely, 2^42520503 is an apocalyptic number.

42520503 is a deficient number, since it is larger than the sum of its proper divisors (14173505).

42520503 is a wasteful number, since it uses less digits than its factorization.

42520503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14173504.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 42520503 is about 6520.7747239113. The cubic root of 42520503 is about 349.0327114983.

The spelling of 42520503 in words is "forty-two million, five hundred twenty thousand, five hundred three".