142121434 has 16 divisors (see below), whose sum is σ = 262378368. Its totient is φ = 56223792.

The previous prime is 142121417. The next prime is 142121449. The reversal of 142121434 is 434121241.

It is a happy number.

142121434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390262 + ... + 390625.

It is an arithmetic number, because the mean of its divisors is an integer number (16398648).

Almost surely, 2^142121434 is an apocalyptic number.

142121434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

142121434 is a deficient number, since it is larger than the sum of its proper divisors (120256934).

142121434 is a wasteful number, since it uses less digits than its factorization.

142121434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780909.

The product of its digits is 768, while the sum is 22.

The square root of 142121434 is about 11921.4694564051. The cubic root of 142121434 is about 521.8590190954.

Adding to 142121434 its reverse (434121241), we get a palindrome (576242675).

The spelling of 142121434 in words is "one hundred forty-two million, one hundred twenty-one thousand, four hundred thirty-four".