542430403 has 4 divisors (see below), whose sum is σ = 546332920. Its totient is φ = 538527888.

The previous prime is 542430389. The next prime is 542430409. The reversal of 542430403 is 304034245.

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 542430403 - 2²⁵ = 508875971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542430409) 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, 1951050 + ... + 1951327.

It is an arithmetic number, because the mean of its divisors is an integer number (136583230).

Almost surely, 2^542430403 is an apocalyptic number.

542430403 is a deficient number, since it is larger than the sum of its proper divisors (3902517).

542430403 is a wasteful number, since it uses less digits than its factorization.

542430403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902516.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 542430403 is about 23290.1353151930. The cubic root of 542430403 is about 815.5451472114.

Adding to 542430403 its reverse (304034245), we get a palindrome (846464648).

The spelling of 542430403 in words is "five hundred forty-two million, four hundred thirty thousand, four hundred three".