142421434 has 8 divisors (see below), whose sum is σ = 213710580. Its totient is φ = 71184576.

The previous prime is 142421417. The next prime is 142421491. The reversal of 142421434 is 434124241.

It can be written as a sum of positive squares in 2 ways, for example, as 122036209 + 20385225 = 11047^2 + 4515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 142421399 and 142421408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349 + ... + 17704.

Almost surely, 2^142421434 is an apocalyptic number.

142421434 is a deficient number, since it is larger than the sum of its proper divisors (71289146).

142421434 is a wasteful number, since it uses less digits than its factorization.

142421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26144.

The product of its digits is 3072, while the sum is 25.

The square root of 142421434 is about 11934.0451649891. The cubic root of 142421434 is about 522.2259533727.

Adding to 142421434 its reverse (434124241), we get a palindrome (576545675).

The spelling of 142421434 in words is "one hundred forty-two million, four hundred twenty-one thousand, four hundred thirty-four".