142420193 has 2 divisors, whose sum is σ = 142420194. Its totient is φ = 142420192.

The previous prime is 142420123. The next prime is 142420253. The reversal of 142420193 is 391024241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96275344 + 46144849 = 9812^2 + 6793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142420193 is a prime.

It is a super-2 number, since 2×142420193² = 40567022748314498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142420123) 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, 71210096 + 71210097.

It is an arithmetic number, because the mean of its divisors is an integer number (71210097).

Almost surely, 2^142420193 is an apocalyptic number.

It is an amenable number.

142420193 is a deficient number, since it is larger than the sum of its proper divisors (1).

142420193 is an equidigital number, since it uses as much as digits as its factorization.

142420193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 142420193 is about 11933.9931707706. The cubic root of 142420193 is about 522.2244365498.

The spelling of 142420193 in words is "one hundred forty-two million, four hundred twenty thousand, one hundred ninety-three".