42400003 has 4 divisors (see below), whose sum is σ = 42493240. Its totient is φ = 42306768.

The previous prime is 42399983. The next prime is 42400009. The reversal of 42400003 is 30000424.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42400003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42400009) 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, 45933 + ... + 46846.

It is an arithmetic number, because the mean of its divisors is an integer number (10623310).

Almost surely, 2^42400003 is an apocalyptic number.

42400003 is a deficient number, since it is larger than the sum of its proper divisors (93237).

42400003 is an equidigital number, since it uses as much as digits as its factorization.

42400003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93236.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 42400003 is about 6511.5284688005. The cubic root of 42400003 is about 348.7026884771.

Adding to 42400003 its reverse (30000424), we get a palindrome (72400427).

The spelling of 42400003 in words is "forty-two million, four hundred thousand, three".