42257145 has 64 divisors (see below), whose sum is σ = 80985600. Its totient is φ = 18413568.

The previous prime is 42257129. The next prime is 42257161. The reversal of 42257145 is 54175224.

42257145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42257129) and next prime (42257161).

It is not a de Polignac number, because 42257145 - 2⁴ = 42257129 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 283531 + ... + 283679.

It is an arithmetic number, because the mean of its divisors is an integer number (1265400).

Almost surely, 2^42257145 is an apocalyptic number.

It is an amenable number.

42257145 is a deficient number, since it is larger than the sum of its proper divisors (38728455).

42257145 is a wasteful number, since it uses less digits than its factorization.

42257145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274.

The product of its digits is 11200, while the sum is 30.

The square root of 42257145 is about 6500.5495921499. The cubic root of 42257145 is about 348.3106207322.

The spelling of 42257145 in words is "forty-two million, two hundred fifty-seven thousand, one hundred forty-five".