142171903 has 2 divisors, whose sum is σ = 142171904. Its totient is φ = 142171902.

The previous prime is 142171879. The next prime is 142171957. The reversal of 142171903 is 309171241.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142171903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142171703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71085951 + 71085952.

It is an arithmetic number, because the mean of its divisors is an integer number (71085952).

Almost surely, 2^142171903 is an apocalyptic number.

142171903 is a deficient number, since it is larger than the sum of its proper divisors (1).

142171903 is an equidigital number, since it uses as much as digits as its factorization.

142171903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 142171903 is about 11923.5859958320. The cubic root of 142171903 is about 521.9207845521.

The spelling of 142171903 in words is "one hundred forty-two million, one hundred seventy-one thousand, nine hundred three".