1040542121 has 2 divisors, whose sum is σ = 1040542122. Its totient is φ = 1040542120.

The previous prime is 1040542067. The next prime is 1040542123. The reversal of 1040542121 is 1212450401.

It is a happy number.

1040542121 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., 960690025 + 79852096 = 30995^2 + 8936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040542121 - 2¹⁴ = 1040525737 is a prime.

Together with 1040542123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040542093 and 1040542102.

It is not a weakly prime, because it can be changed into another prime (1040542123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520271060 + 520271061.

It is an arithmetic number, because the mean of its divisors is an integer number (520271061).

Almost surely, 2^1040542121 is an apocalyptic number.

It is an amenable number.

1040542121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040542121 is an equidigital number, since it uses as much as digits as its factorization.

1040542121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1040542121 is about 32257.4351274245. The cubic root of 1040542121 is about 1013.3354165061.

Adding to 1040542121 its reverse (1212450401), we get a palindrome (2252992522).

The spelling of 1040542121 in words is "one billion, forty million, five hundred forty-two thousand, one hundred twenty-one".