42225457 has 2 divisors, whose sum is σ = 42225458. Its totient is φ = 42225456.

The previous prime is 42225413. The next prime is 42225461. The reversal of 42225457 is 75452224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42107121 + 118336 = 6489^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 42225457 - 2⁷ = 42225329 is a prime.

It is not a weakly prime, because it can be changed into another prime (42225257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21112728 + 21112729.

It is an arithmetic number, because the mean of its divisors is an integer number (21112729).

Almost surely, 2^42225457 is an apocalyptic number.

It is an amenable number.

42225457 is a deficient number, since it is larger than the sum of its proper divisors (1).

42225457 is an equidigital number, since it uses as much as digits as its factorization.

42225457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 31.

The square root of 42225457 is about 6498.1118026701. Note that the first 3 decimals coincide. The cubic root of 42225457 is about 348.2235346548.

The spelling of 42225457 in words is "forty-two million, two hundred twenty-five thousand, four hundred fifty-seven".