142121303 has 4 divisors (see below), whose sum is σ = 142150728. Its totient is φ = 142091880.

The previous prime is 142121299. The next prime is 142121323. The reversal of 142121303 is 303121241.

142121303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303121241 = 41 ⋅7393201.

It is a cyclic number.

It is not a de Polignac number, because 142121303 - 2² = 142121299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142121323) 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, 5576 + ... + 17757.

It is an arithmetic number, because the mean of its divisors is an integer number (35537682).

Almost surely, 2^142121303 is an apocalyptic number.

142121303 is a deficient number, since it is larger than the sum of its proper divisors (29425).

142121303 is an equidigital number, since it uses as much as digits as its factorization.

142121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29424.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 142121303 is about 11921.4639621147. The cubic root of 142121303 is about 521.8588587547.

Adding to 142121303 its reverse (303121241), we get a palindrome (445242544).

The spelling of 142121303 in words is "one hundred forty-two million, one hundred twenty-one thousand, three hundred three".