42000003 has 6 divisors (see below), whose sum is σ = 60666684. Its totient is φ = 27999996.

The previous prime is 41999987. The next prime is 42000011. The reversal of 42000003 is 30000024.

It is not a de Polignac number, because 42000003 - 2⁴ = 41999987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 4666667 = 42000003 / (4 + 2 + 0 + 0 + 0 + 0 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (42000073) 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 5 ways as a sum of consecutive naturals, for example, 2333325 + ... + 2333342.

It is an arithmetic number, because the mean of its divisors is an integer number (10111114).

Almost surely, 2^42000003 is an apocalyptic number.

42000003 is a deficient number, since it is larger than the sum of its proper divisors (18666681).

42000003 is a wasteful number, since it uses less digits than its factorization.

42000003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666673 (or 4666670 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 42000003 is about 6480.7409298629. The cubic root of 42000003 is about 347.6026727649.

Adding to 42000003 its reverse (30000024), we get a palindrome (72000027).

The spelling of 42000003 in words is "forty-two million, three", and thus it is an aban number and an uban number.