42221741 has 2 divisors, whose sum is σ = 42221742. Its totient is φ = 42221740.

The previous prime is 42221731. The next prime is 42221747. The reversal of 42221741 is 14712224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 13169641 = 5390^2 + 3629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42221741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42221747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110870 + 21110871.

It is an arithmetic number, because the mean of its divisors is an integer number (21110871).

Almost surely, 2^42221741 is an apocalyptic number.

It is an amenable number.

42221741 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221741 is an equidigital number, since it uses as much as digits as its factorization.

42221741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 23.

The square root of 42221741 is about 6497.8258671651. The cubic root of 42221741 is about 348.2133193589.

Adding to 42221741 its reverse (14712224), we get a palindrome (56933965).

The spelling of 42221741 in words is "forty-two million, two hundred twenty-one thousand, seven hundred forty-one".