142121134 has 4 divisors (see below), whose sum is σ = 213181704. Its totient is φ = 71060566.

The previous prime is 142121131. The next prime is 142121153. The reversal of 142121134 is 431121241.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142121131) 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 as a sum of consecutive naturals, namely, 35530282 + ... + 35530285.

It is an arithmetic number, because the mean of its divisors is an integer number (53295426).

Almost surely, 2^142121134 is an apocalyptic number.

142121134 is a deficient number, since it is larger than the sum of its proper divisors (71060570).

142121134 is an equidigital number, since it uses as much as digits as its factorization.

142121134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71060569.

The product of its digits is 192, while the sum is 19.

The square root of 142121134 is about 11921.4568740570. The cubic root of 142121134 is about 521.8586519028.

Adding to 142121134 its reverse (431121241), we get a palindrome (573242375).

The spelling of 142121134 in words is "one hundred forty-two million, one hundred twenty-one thousand, one hundred thirty-four".