1828121 has 2 divisors, whose sum is σ = 1828122. Its totient is φ = 1828120.

The previous prime is 1828117. The next prime is 1828153. The reversal of 1828121 is 1218281.

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., 1537600 + 290521 = 1240^2 + 539^2 .

It is an emirp because it is prime and its reverse (1218281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1828121 - 2² = 1828117 is a prime.

It is not a weakly prime, because it can be changed into another prime (1821121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914060 + 914061.

It is an arithmetic number, because the mean of its divisors is an integer number (914061).

2^1828121 is an apocalyptic number.

It is an amenable number.

1828121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1828121 is an equidigital number, since it uses as much as digits as its factorization.

1828121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 23.

The square root of 1828121 is about 1352.0802490977. The cubic root of 1828121 is about 122.2742419825.

The spelling of 1828121 in words is "one million, eight hundred twenty-eight thousand, one hundred twenty-one".