142121433 has 4 divisors (see below), whose sum is σ = 189495248. Its totient is φ = 94747620.

The previous prime is 142121417. The next prime is 142121449. The reversal of 142121433 is 334121241.

142121433 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 334121241 = 3 ⋅111373747.

It is an interprime number because it is at equal distance from previous prime (142121417) and next prime (142121449).

It is not a de Polignac number, because 142121433 - 2⁴ = 142121417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142121333) 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, 23686903 + ... + 23686908.

It is an arithmetic number, because the mean of its divisors is an integer number (47373812).

Almost surely, 2^142121433 is an apocalyptic number.

It is an amenable number.

142121433 is a deficient number, since it is larger than the sum of its proper divisors (47373815).

142121433 is an equidigital number, since it uses as much as digits as its factorization.

142121433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47373814.

The product of its digits is 576, while the sum is 21.

The square root of 142121433 is about 11921.4694144640. The cubic root of 142121433 is about 521.8590178714.

Adding to 142121433 its reverse (334121241), we get a palindrome (476242674).

The spelling of 142121433 in words is "one hundred forty-two million, one hundred twenty-one thousand, four hundred thirty-three".