142639411 has 4 divisors (see below), whose sum is σ = 144977824. Its totient is φ = 140301000.

The previous prime is 142639397. The next prime is 142639417. The reversal of 142639411 is 114936241.

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

It is a cyclic number.

It is not a de Polignac number, because 142639411 - 2⁵ = 142639379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142639417) 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, 1169115 + ... + 1169236.

It is an arithmetic number, because the mean of its divisors is an integer number (36244456).

Almost surely, 2^142639411 is an apocalyptic number.

142639411 is a deficient number, since it is larger than the sum of its proper divisors (2338413).

142639411 is an equidigital number, since it uses as much as digits as its factorization.

142639411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338412.

The product of its digits is 5184, while the sum is 31.

The square root of 142639411 is about 11943.1742430562. The cubic root of 142639411 is about 522.4922410575.

The spelling of 142639411 in words is "one hundred forty-two million, six hundred thirty-nine thousand, four hundred eleven".