42961517 has 2 divisors, whose sum is σ = 42961518. Its totient is φ = 42961516.

The previous prime is 42961511. The next prime is 42961519. The reversal of 42961517 is 71516924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24462916 + 18498601 = 4946^2 + 4301^2 .

It is a cyclic number.

It is not a de Polignac number, because 42961517 - 2⁶ = 42961453 is a prime.

Together with 42961519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42961511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21480758 + 21480759.

It is an arithmetic number, because the mean of its divisors is an integer number (21480759).

Almost surely, 2^42961517 is an apocalyptic number.

It is an amenable number.

42961517 is a deficient number, since it is larger than the sum of its proper divisors (1).

42961517 is an equidigital number, since it uses as much as digits as its factorization.

42961517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 42961517 is about 6554.5035662512. The cubic root of 42961517 is about 350.2352622347.

The spelling of 42961517 in words is "forty-two million, nine hundred sixty-one thousand, five hundred seventeen".