1242121 has 2 divisors, whose sum is σ = 1242122. Its totient is φ = 1242120.

The previous prime is 1242119. The next prime is 1242151. The reversal of 1242121 is 1212421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876096 + 366025 = 936^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242121 - 2¹ = 1242119 is a prime.

Together with 1242119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1242151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621060 + 621061.

It is an arithmetic number, because the mean of its divisors is an integer number (621061).

2^1242121 is an apocalyptic number.

It is an amenable number.

1242121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242121 is an equidigital number, since it uses as much as digits as its factorization.

1242121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 13.

The square root of 1242121 is about 1114.5048227801. The cubic root of 1242121 is about 107.4949267481.

Adding to 1242121 its reverse (1212421), we get a palindrome (2454542).

The spelling of 1242121 in words is "one million, two hundred forty-two thousand, one hundred twenty-one".