142431403 has 4 divisors (see below), whose sum is σ = 144147528. Its totient is φ = 140715280.

The previous prime is 142431379. The next prime is 142431409. The reversal of 142431403 is 304134241.

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 142431403 - 2¹⁷ = 142300331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142431409) 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, 857938 + ... + 858103.

It is an arithmetic number, because the mean of its divisors is an integer number (36036882).

Almost surely, 2^142431403 is an apocalyptic number.

142431403 is a deficient number, since it is larger than the sum of its proper divisors (1716125).

142431403 is an equidigital number, since it uses as much as digits as its factorization.

142431403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716124.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 142431403 is about 11934.4628282969. The cubic root of 142431403 is about 522.2381377491.

Adding to 142431403 its reverse (304134241), we get a palindrome (446565644).

The spelling of 142431403 in words is "one hundred forty-two million, four hundred thirty-one thousand, four hundred three".