1888121 has 2 divisors, whose sum is σ = 1888122. Its totient is φ = 1888120.

The previous prime is 1888097. The next prime is 1888123. The reversal of 1888121 is 1218881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1755625 + 132496 = 1325^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1888121 - 2¹⁸ = 1625977 is a prime.

Together with 1888123, 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 (1888123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944060 + 944061.

It is an arithmetic number, because the mean of its divisors is an integer number (944061).

2^1888121 is an apocalyptic number.

It is an amenable number.

1888121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1888121 is an equidigital number, since it uses as much as digits as its factorization.

1888121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 29.

The square root of 1888121 is about 1374.0891528573. The cubic root of 1888121 is about 123.5975724187.

The spelling of 1888121 in words is "one million, eight hundred eighty-eight thousand, one hundred twenty-one".