142943237 has 2 divisors, whose sum is σ = 142943238. Its totient is φ = 142943236.

The previous prime is 142943231. The next prime is 142943239. The reversal of 142943237 is 732349241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122567041 + 20376196 = 11071^2 + 4514^2 .

It is a cyclic number.

It is not a de Polignac number, because 142943237 - 2⁸ = 142942981 is a prime.

Together with 142943239, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 142943197 and 142943206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142943231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71471618 + 71471619.

It is an arithmetic number, because the mean of its divisors is an integer number (71471619).

Almost surely, 2^142943237 is an apocalyptic number.

It is an amenable number.

142943237 is a deficient number, since it is larger than the sum of its proper divisors (1).

142943237 is an equidigital number, since it uses as much as digits as its factorization.

142943237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 142943237 is about 11955.8871272691. The cubic root of 142943237 is about 522.8629524152.

The spelling of 142943237 in words is "one hundred forty-two million, nine hundred forty-three thousand, two hundred thirty-seven".