42256249 has 4 divisors (see below), whose sum is σ = 48292864. Its totient is φ = 36219636.

The previous prime is 42256241. The next prime is 42256259. The reversal of 42256249 is 94265224.

42256249 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42256249 - 2³ = 42256241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42256241) 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, 3018297 + ... + 3018310.

It is an arithmetic number, because the mean of its divisors is an integer number (12073216).

Almost surely, 2^42256249 is an apocalyptic number.

It is an amenable number.

42256249 is a deficient number, since it is larger than the sum of its proper divisors (6036615).

42256249 is an equidigital number, since it uses as much as digits as its factorization.

42256249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036614.

The product of its digits is 34560, while the sum is 34.

The square root of 42256249 is about 6500.4806745348. The cubic root of 42256249 is about 348.3081589116.

The spelling of 42256249 in words is "forty-two million, two hundred fifty-six thousand, two hundred forty-nine".