42275521 has 2 divisors, whose sum is σ = 42275522. Its totient is φ = 42275520.

The previous prime is 42275489. The next prime is 42275539. The reversal of 42275521 is 12557224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40132225 + 2143296 = 6335^2 + 1464^2 .

It is a cyclic number.

It is not a de Polignac number, because 42275521 - 2⁵ = 42275489 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42275521.

It is not a weakly prime, because it can be changed into another prime (42275561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21137760 + 21137761.

It is an arithmetic number, because the mean of its divisors is an integer number (21137761).

Almost surely, 2^42275521 is an apocalyptic number.

It is an amenable number.

42275521 is a deficient number, since it is larger than the sum of its proper divisors (1).

42275521 is an equidigital number, since it uses as much as digits as its factorization.

42275521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 28.

The square root of 42275521 is about 6501.9628574762. The cubic root of 42275521 is about 348.3611023600.

The spelling of 42275521 in words is "forty-two million, two hundred seventy-five thousand, five hundred twenty-one".