42262261 has 2 divisors, whose sum is σ = 42262262. Its totient is φ = 42262260.

The previous prime is 42262237. The next prime is 42262277. The reversal of 42262261 is 16226224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40068900 + 2193361 = 6330^2 + 1481^2 .

It is a cyclic number.

It is not a de Polignac number, because 42262261 - 2¹¹ = 42260213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42262361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21131130 + 21131131.

It is an arithmetic number, because the mean of its divisors is an integer number (21131131).

Almost surely, 2^42262261 is an apocalyptic number.

It is an amenable number.

42262261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42262261 is an equidigital number, since it uses as much as digits as its factorization.

42262261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 42262261 is about 6500.9430854300. The cubic root of 42262261 is about 348.3246766212.

Adding to 42262261 its reverse (16226224), we get a palindrome (58488485).

The spelling of 42262261 in words is "forty-two million, two hundred sixty-two thousand, two hundred sixty-one".