1042121 has 2 divisors, whose sum is σ = 1042122. Its totient is φ = 1042120.

The previous prime is 1042109. The next prime is 1042123. The reversal of 1042121 is 1212401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657721 + 384400 = 811^2 + 620^2 .

It is an emirp because it is prime and its reverse (1212401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042121 is a prime.

Together with 1042123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1042123) 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, 521060 + 521061.

It is an arithmetic number, because the mean of its divisors is an integer number (521061).

2^1042121 is an apocalyptic number.

It is an amenable number.

1042121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042121 is an equidigital number, since it uses as much as digits as its factorization.

1042121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1042121 is about 1020.8432788631. The cubic root of 1042121 is about 101.3847689686.

Adding to 1042121 its reverse (1212401), we get a palindrome (2254522).

The spelling of 1042121 in words is "one million, forty-two thousand, one hundred twenty-one".