142344121 has 4 divisors (see below), whose sum is σ = 142399972. Its totient is φ = 142288272.

The previous prime is 142344109. The next prime is 142344131. The reversal of 142344121 is 121443241.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33767721 + 108576400 = 5811^2 + 10420^2 .

It is a cyclic number.

It is not a de Polignac number, because 142344121 - 2⁵ = 142344089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142344092 and 142344101.

It is not an unprimeable number, because it can be changed into a prime (142344101) 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, 23910 + ... + 29263.

It is an arithmetic number, because the mean of its divisors is an integer number (35599993).

Almost surely, 2^142344121 is an apocalyptic number.

It is an amenable number.

142344121 is a deficient number, since it is larger than the sum of its proper divisors (55851).

142344121 is an equidigital number, since it uses as much as digits as its factorization.

142344121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55850.

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

The square root of 142344121 is about 11930.8055469863. The cubic root of 142344121 is about 522.1314400634.

Adding to 142344121 its reverse (121443241), we get a palindrome (263787362).

The spelling of 142344121 in words is "one hundred forty-two million, three hundred forty-four thousand, one hundred twenty-one".