42512003 has 4 divisors (see below), whose sum is σ = 42538008. Its totient is φ = 42486000.

The previous prime is 42511991. The next prime is 42512023. The reversal of 42512003 is 30021524.

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 42512003 - 2⁶ = 42511939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42512023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10373 + ... + 13878.

It is an arithmetic number, because the mean of its divisors is an integer number (10634502).

Almost surely, 2^42512003 is an apocalyptic number.

42512003 is a deficient number, since it is larger than the sum of its proper divisors (26005).

42512003 is a wasteful number, since it uses less digits than its factorization.

42512003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26004.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 42512003 is about 6520.1229282890. The cubic root of 42512003 is about 349.0094523210.

Adding to 42512003 its reverse (30021524), we get a palindrome (72533527).

The spelling of 42512003 in words is "forty-two million, five hundred twelve thousand, three".