42922081 has 2 divisors, whose sum is σ = 42922082. Its totient is φ = 42922080.

The previous prime is 42922069. The next prime is 42922091. The reversal of 42922081 is 18022924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 15673681 = 5220^2 + 3959^2 .

It is a cyclic number.

It is not a de Polignac number, because 42922081 - 2⁵ = 42922049 is a prime.

It is a super-2 number, since 2×42922081² = 3684610074741122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42922021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21461040 + 21461041.

It is an arithmetic number, because the mean of its divisors is an integer number (21461041).

Almost surely, 2^42922081 is an apocalyptic number.

It is an amenable number.

42922081 is a deficient number, since it is larger than the sum of its proper divisors (1).

42922081 is an equidigital number, since it uses as much as digits as its factorization.

42922081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 42922081 is about 6551.4945623117. The cubic root of 42922081 is about 350.1280647001.

It can be divided in two parts, 429 and 22081, that multiplied together give a palindrome (9472749).

The spelling of 42922081 in words is "forty-two million, nine hundred twenty-two thousand, eighty-one".