142471117 has 2 divisors, whose sum is σ = 142471118. Its totient is φ = 142471116.

The previous prime is 142471103. The next prime is 142471123. The reversal of 142471117 is 711174241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98128836 + 44342281 = 9906^2 + 6659^2 .

It is a cyclic number.

It is not a de Polignac number, because 142471117 - 2¹⁵ = 142438349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142471157) 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, 71235558 + 71235559.

It is an arithmetic number, because the mean of its divisors is an integer number (71235559).

Almost surely, 2^142471117 is an apocalyptic number.

It is an amenable number.

142471117 is a deficient number, since it is larger than the sum of its proper divisors (1).

142471117 is an equidigital number, since it uses as much as digits as its factorization.

142471117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 28.

The square root of 142471117 is about 11936.1265492621. The cubic root of 142471117 is about 522.2866716108.

The spelling of 142471117 in words is "one hundred forty-two million, four hundred seventy-one thousand, one hundred seventeen".