42043403 has 4 divisors (see below), whose sum is σ = 42436440. Its totient is φ = 41650368.

The previous prime is 42043399. The next prime is 42043411. The reversal of 42043403 is 30434024.

It is a happy number.

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 42043403 - 2² = 42043399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42043423) 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, 196358 + ... + 196571.

It is an arithmetic number, because the mean of its divisors is an integer number (10609110).

Almost surely, 2^42043403 is an apocalyptic number.

42043403 is a deficient number, since it is larger than the sum of its proper divisors (393037).

42043403 is a wasteful number, since it uses less digits than its factorization.

42043403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393036.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 42043403 is about 6484.0884478853. The cubic root of 42043403 is about 347.7223613493.

Adding to 42043403 its reverse (30434024), we get a palindrome (72477427).

The spelling of 42043403 in words is "forty-two million, forty-three thousand, four hundred three".