342505517 has 2 divisors, whose sum is σ = 342505518. Its totient is φ = 342505516.

The previous prime is 342505507. The next prime is 342505523. The reversal of 342505517 is 715505243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342028036 + 477481 = 18494^2 + 691^2 .

It is an emirp because it is prime and its reverse (715505243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 342505517 - 2¹⁰ = 342504493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342505507) 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, 171252758 + 171252759.

It is an arithmetic number, because the mean of its divisors is an integer number (171252759).

Almost surely, 2^342505517 is an apocalyptic number.

It is an amenable number.

342505517 is a deficient number, since it is larger than the sum of its proper divisors (1).

342505517 is an equidigital number, since it uses as much as digits as its factorization.

342505517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 342505517 is about 18506.9045764007. The cubic root of 342505517 is about 699.6634552293.

The spelling of 342505517 in words is "three hundred forty-two million, five hundred five thousand, five hundred seventeen".