42221701 has 2 divisors, whose sum is σ = 42221702. Its totient is φ = 42221700.

The previous prime is 42221687. The next prime is 42221723. The reversal of 42221701 is 10712224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 2405601 = 6310^2 + 1551^2 .

It is a cyclic number.

It is not a de Polignac number, because 42221701 - 2¹⁵ = 42188933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42221731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110850 + 21110851.

It is an arithmetic number, because the mean of its divisors is an integer number (21110851).

Almost surely, 2^42221701 is an apocalyptic number.

It is an amenable number.

42221701 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221701 is an equidigital number, since it uses as much as digits as its factorization.

42221701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 42221701 is about 6497.8227892118. The cubic root of 42221701 is about 348.2132093955.

Adding to 42221701 its reverse (10712224), we get a palindrome (52933925).

The spelling of 42221701 in words is "forty-two million, two hundred twenty-one thousand, seven hundred one".