42925121 has 2 divisors, whose sum is σ = 42925122. Its totient is φ = 42925120.

The previous prime is 42925087. The next prime is 42925139. The reversal of 42925121 is 12152924.

42925121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 4000000 = 6239^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 42925121 - 2¹⁴ = 42908737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42925171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21462560 + 21462561.

It is an arithmetic number, because the mean of its divisors is an integer number (21462561).

Almost surely, 2^42925121 is an apocalyptic number.

It is an amenable number.

42925121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42925121 is an equidigital number, since it uses as much as digits as its factorization.

42925121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 42925121 is about 6551.7265663335. The cubic root of 42925121 is about 350.1363305637.

The spelling of 42925121 in words is "forty-two million, nine hundred twenty-five thousand, one hundred twenty-one".