42204257 has 4 divisors (see below), whose sum is σ = 42577860. Its totient is φ = 41830656.

The previous prime is 42204247. The next prime is 42204277. The reversal of 42204257 is 75240224.

42204257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 614656 + 41589601 = 784^2 + 6449^2 .

It is a cyclic number.

It is not a de Polignac number, because 42204257 - 2¹² = 42200161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42204247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186632 + ... + 186857.

It is an arithmetic number, because the mean of its divisors is an integer number (10644465).

Almost surely, 2^42204257 is an apocalyptic number.

It is an amenable number.

42204257 is a deficient number, since it is larger than the sum of its proper divisors (373603).

42204257 is a wasteful number, since it uses less digits than its factorization.

42204257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373602.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 42204257 is about 6496.4803547767. The cubic root of 42204257 is about 348.1652477407.

The spelling of 42204257 in words is "forty-two million, two hundred four thousand, two hundred fifty-seven".