42221270 has 96 divisors (see below), whose sum is σ = 97396992. Its totient is φ = 12894336.

The previous prime is 42221269. The next prime is 42221273. The reversal of 42221270 is 7212224.

It is a happy number.

42221270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221273) 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 47 ways as a sum of consecutive naturals, for example, 508649 + ... + 508731.

It is an arithmetic number, because the mean of its divisors is an integer number (1014552).

Almost surely, 2^42221270 is an apocalyptic number.

42221270 is an abundant number, since it is smaller than the sum of its proper divisors (55175722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42221270 is a wasteful number, since it uses less digits than its factorization.

42221270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 42221270 is about 6497.7896241722. The cubic root of 42221270 is about 348.2120245356.

Adding to 42221270 its reverse (7212224), we get a palindrome (49433494).

The spelling of 42221270 in words is "forty-two million, two hundred twenty-one thousand, two hundred seventy".