142994231 has 2 divisors, whose sum is σ = 142994232. Its totient is φ = 142994230.

The previous prime is 142994219. The next prime is 142994237. The reversal of 142994231 is 132499241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142994231 - 2⁶ = 142994167 is a prime.

It is a super-2 number, since 2×142994231² = 40894700198562722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142994191 and 142994200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142994237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71497115 + 71497116.

It is an arithmetic number, because the mean of its divisors is an integer number (71497116).

Almost surely, 2^142994231 is an apocalyptic number.

142994231 is a deficient number, since it is larger than the sum of its proper divisors (1).

142994231 is an equidigital number, since it uses as much as digits as its factorization.

142994231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 142994231 is about 11958.0195266608. The cubic root of 142994231 is about 522.9251209235.

The spelling of 142994231 in words is "one hundred forty-two million, nine hundred ninety-four thousand, two hundred thirty-one".