142312133 has 4 divisors (see below), whose sum is σ = 142950528. Its totient is φ = 141673740.

The previous prime is 142312129. The next prime is 142312153. The reversal of 142312133 is 331213241.

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: 331213241 = 211 ⋅1569731.

It is a cyclic number.

It is not a de Polignac number, because 142312133 - 2² = 142312129 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 (142312123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318863 + ... + 319308.

It is an arithmetic number, because the mean of its divisors is an integer number (35737632).

Almost surely, 2^142312133 is an apocalyptic number.

It is an amenable number.

142312133 is a deficient number, since it is larger than the sum of its proper divisors (638395).

142312133 is an equidigital number, since it uses as much as digits as its factorization.

142312133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638394.

The product of its digits is 432, while the sum is 20.

The square root of 142312133 is about 11929.4649083687. The cubic root of 142312133 is about 522.0923254829.

Adding to 142312133 its reverse (331213241), we get a palindrome (473525374).

The spelling of 142312133 in words is "one hundred forty-two million, three hundred twelve thousand, one hundred thirty-three".