42780241 has 4 divisors (see below), whose sum is σ = 48891712. Its totient is φ = 36668772.

The previous prime is 42780233. The next prime is 42780281. The reversal of 42780241 is 14208724.

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 not a de Polignac number, because 42780241 - 2³ = 42780233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42780281) 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 in 3 ways as a sum of consecutive naturals, for example, 3055725 + ... + 3055738.

It is an arithmetic number, because the mean of its divisors is an integer number (12222928).

Almost surely, 2^42780241 is an apocalyptic number.

It is an amenable number.

42780241 is a deficient number, since it is larger than the sum of its proper divisors (6111471).

42780241 is an equidigital number, since it uses as much as digits as its factorization.

42780241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111470.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 42780241 is about 6540.6605935486. The cubic root of 42780241 is about 349.7419621891.

Adding to 42780241 its reverse (14208724), we get a palindrome (56988965).

The spelling of 42780241 in words is "forty-two million, seven hundred eighty thousand, two hundred forty-one".