42442251 has 12 divisors (see below), whose sum is σ = 60115512. Its totient is φ = 26629888.

The previous prime is 42442237. The next prime is 42442259. The reversal of 42442251 is 15224424.

It is a happy number.

42442251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42442251 - 2⁶ = 42442187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42442259) 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 11 ways as a sum of consecutive naturals, for example, 23610 + ... + 25343.

It is an arithmetic number, because the mean of its divisors is an integer number (5009626).

Almost surely, 2^42442251 is an apocalyptic number.

42442251 is a deficient number, since it is larger than the sum of its proper divisors (17673261).

42442251 is a wasteful number, since it uses less digits than its factorization.

42442251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48990 (or 48973 counting only the distinct ones).

The product of its digits is 2560, while the sum is 24.

The square root of 42442251 is about 6514.7717534845. The cubic root of 42442251 is about 348.8184675635.

Adding to 42442251 its reverse (15224424), we get a palindrome (57666675).

The spelling of 42442251 in words is "forty-two million, four hundred forty-two thousand, two hundred fifty-one".