42417245261 has 2 divisors, whose sum is σ = 42417245262. Its totient is φ = 42417245260.

The previous prime is 42417245249. The next prime is 42417245263. The reversal of 42417245261 is 16254271424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32202302500 + 10214942761 = 179450^2 + 101069^2 .

It is a cyclic number.

It is not a de Polignac number, because 42417245261 - 2¹⁴ = 42417228877 is a prime.

Together with 42417245263, 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 (42417245263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21208622630 + 21208622631.

It is an arithmetic number, because the mean of its divisors is an integer number (21208622631).

Almost surely, 2^42417245261 is an apocalyptic number.

It is an amenable number.

42417245261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42417245261 is an equidigital number, since it uses as much as digits as its factorization.

42417245261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 38.

The spelling of 42417245261 in words is "forty-two billion, four hundred seventeen million, two hundred forty-five thousand, two hundred sixty-one".