142401403 has 4 divisors (see below), whose sum is σ = 142681680. Its totient is φ = 142121128.

The previous prime is 142401379. The next prime is 142401421. The reversal of 142401403 is 304104241.

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-142401403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142401443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139375 + ... + 140392.

It is an arithmetic number, because the mean of its divisors is an integer number (35670420).

Almost surely, 2^142401403 is an apocalyptic number.

142401403 is a deficient number, since it is larger than the sum of its proper divisors (280277).

142401403 is an equidigital number, since it uses as much as digits as its factorization.

142401403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280276.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142401403 is about 11933.2058978298. The cubic root of 142401403 is about 522.2014692338.

Adding to 142401403 its reverse (304104241), we get a palindrome (446505644).

The spelling of 142401403 in words is "one hundred forty-two million, four hundred one thousand, four hundred three".