1942121 has 2 divisors, whose sum is σ = 1942122. Its totient is φ = 1942120.

The previous prime is 1942111. The next prime is 1942133. The reversal of 1942121 is 1212491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 698896 = 1115^2 + 836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1942121 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1942093 and 1942102.

It is not a weakly prime, because it can be changed into another prime (1942111) 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, 971060 + 971061.

It is an arithmetic number, because the mean of its divisors is an integer number (971061).

2^1942121 is an apocalyptic number.

It is an amenable number.

1942121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1942121 is an equidigital number, since it uses as much as digits as its factorization.

1942121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 1942121 is about 1393.6000143513. The cubic root of 1942121 is about 124.7648057469.

The spelling of 1942121 in words is "one million, nine hundred forty-two thousand, one hundred twenty-one".