142111631 has 2 divisors, whose sum is σ = 142111632. Its totient is φ = 142111630.

The previous prime is 142111601. The next prime is 142111637. The reversal of 142111631 is 136111241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142111631 is a prime.

It is a super-2 number, since 2×142111631² = 40391431330960322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142111637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71055815 + 71055816.

It is an arithmetic number, because the mean of its divisors is an integer number (71055816).

Almost surely, 2^142111631 is an apocalyptic number.

142111631 is a deficient number, since it is larger than the sum of its proper divisors (1).

142111631 is an equidigital number, since it uses as much as digits as its factorization.

142111631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 142111631 is about 11921.0583003356. The cubic root of 142111631 is about 521.8470201978.

Adding to 142111631 its reverse (136111241), we get a palindrome (278222872).

The spelling of 142111631 in words is "one hundred forty-two million, one hundred eleven thousand, six hundred thirty-one".