42715961 has 2 divisors, whose sum is σ = 42715962. Its totient is φ = 42715960.

The previous prime is 42715931. The next prime is 42715963. The reversal of 42715961 is 16951724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31990336 + 10725625 = 5656^2 + 3275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42715961 is a prime.

Together with 42715963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42715963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21357980 + 21357981.

It is an arithmetic number, because the mean of its divisors is an integer number (21357981).

Almost surely, 2^42715961 is an apocalyptic number.

It is an amenable number.

42715961 is a deficient number, since it is larger than the sum of its proper divisors (1).

42715961 is an equidigital number, since it uses as much as digits as its factorization.

42715961 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 42715961 is about 6535.7448695615. The cubic root of 42715961 is about 349.5667046237.

The spelling of 42715961 in words is "forty-two million, seven hundred fifteen thousand, nine hundred sixty-one".