142120393 has 2 divisors, whose sum is σ = 142120394. Its totient is φ = 142120392.

The previous prime is 142120379. The next prime is 142120403. The reversal of 142120393 is 393021241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91240704 + 50879689 = 9552^2 + 7133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142120393 is a prime.

It is a super-2 number, since 2×142120393² = 40396412212948898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142123393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71060196 + 71060197.

It is an arithmetic number, because the mean of its divisors is an integer number (71060197).

Almost surely, 2^142120393 is an apocalyptic number.

It is an amenable number.

142120393 is a deficient number, since it is larger than the sum of its proper divisors (1).

142120393 is an equidigital number, since it uses as much as digits as its factorization.

142120393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 142120393 is about 11921.4257956001. The cubic root of 142120393 is about 521.8577449349.

The spelling of 142120393 in words is "one hundred forty-two million, one hundred twenty thousand, three hundred ninety-three".