42452257 has 2 divisors, whose sum is σ = 42452258. Its totient is φ = 42452256.

The previous prime is 42452243. The next prime is 42452269. The reversal of 42452257 is 75225424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40144896 + 2307361 = 6336^2 + 1519^2 .

It is a cyclic number.

It is not a de Polignac number, because 42452257 - 2¹¹ = 42450209 is a prime.

It is not a weakly prime, because it can be changed into another prime (42459257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21226128 + 21226129.

It is an arithmetic number, because the mean of its divisors is an integer number (21226129).

Almost surely, 2^42452257 is an apocalyptic number.

It is an amenable number.

42452257 is a deficient number, since it is larger than the sum of its proper divisors (1).

42452257 is an equidigital number, since it uses as much as digits as its factorization.

42452257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 31.

The square root of 42452257 is about 6515.5396553164. The cubic root of 42452257 is about 348.8458773832.

The spelling of 42452257 in words is "forty-two million, four hundred fifty-two thousand, two hundred fifty-seven".