142203643 has 2 divisors, whose sum is σ = 142203644. Its totient is φ = 142203642.

The previous prime is 142203637. The next prime is 142203647. The reversal of 142203643 is 346302241.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142203643 is a prime.

It is not a weakly prime, because it can be changed into another prime (142203647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71101821 + 71101822.

It is an arithmetic number, because the mean of its divisors is an integer number (71101822).

Almost surely, 2^142203643 is an apocalyptic number.

142203643 is a deficient number, since it is larger than the sum of its proper divisors (1).

142203643 is an equidigital number, since it uses as much as digits as its factorization.

142203643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 142203643 is about 11924.9168969851. The cubic root of 142203643 is about 521.9596214173.

Adding to 142203643 its reverse (346302241), we get a palindrome (488505884).

The spelling of 142203643 in words is "one hundred forty-two million, two hundred three thousand, six hundred forty-three".