2257121 has 2 divisors, whose sum is σ = 2257122. Its totient is φ = 2257120.

The previous prime is 2257117. The next prime is 2257139. The reversal of 2257121 is 1217522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 40000 = 1489^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257121 - 2² = 2257117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2257093 and 2257102.

It is not a weakly prime, because it can be changed into another prime (2257721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128560 + 1128561.

It is an arithmetic number, because the mean of its divisors is an integer number (1128561).

2^2257121 is an apocalyptic number.

It is an amenable number.

2257121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257121 is an equidigital number, since it uses as much as digits as its factorization.

2257121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 20.

The square root of 2257121 is about 1502.3717915350. The cubic root of 2257121 is about 131.1751633844.

The spelling of 2257121 in words is "two million, two hundred fifty-seven thousand, one hundred twenty-one".