142706917 has 2 divisors, whose sum is σ = 142706918. Its totient is φ = 142706916.

The previous prime is 142706903. The next prime is 142706939. The reversal of 142706917 is 719607241.

It is a Cunningham number, because it is equal to 11946²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142706916 + 1 = 11946^2 + 1^2 .

It is an emirp because it is prime and its reverse (719607241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142706917 is a prime.

It is equal to p_8056396 and since 142706917 and 8056396 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142700917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71353458 + 71353459.

It is an arithmetic number, because the mean of its divisors is an integer number (71353459).

Almost surely, 2^142706917 is an apocalyptic number.

It is an amenable number.

142706917 is a deficient number, since it is larger than the sum of its proper divisors (1).

142706917 is an equidigital number, since it uses as much as digits as its factorization.

142706917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 142706917 is about 11946.0000418550. Note that the first 4 decimals coincide. The cubic root of 142706917 is about 522.5746535274.

The spelling of 142706917 in words is "one hundred forty-two million, seven hundred six thousand, nine hundred seventeen".