42522761 has 2 divisors, whose sum is σ = 42522762. Its totient is φ = 42522760.

The previous prime is 42522749. The next prime is 42522803. The reversal of 42522761 is 16722524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 9114361 = 5780^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 42522761 - 2¹⁰ = 42521737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42522061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21261380 + 21261381.

It is an arithmetic number, because the mean of its divisors is an integer number (21261381).

Almost surely, 2^42522761 is an apocalyptic number.

It is an amenable number.

42522761 is a deficient number, since it is larger than the sum of its proper divisors (1).

42522761 is an equidigital number, since it uses as much as digits as its factorization.

42522761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 42522761 is about 6520.9478605491. The cubic root of 42522761 is about 349.0388897093.

The spelling of 42522761 in words is "forty-two million, five hundred twenty-two thousand, seven hundred sixty-one".