1890257 has 2 divisors, whose sum is σ = 1890258. Its totient is φ = 1890256.

The previous prime is 1890241. The next prime is 1890269. The reversal of 1890257 is 7520981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 633616 = 1121^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890257 - 2⁴ = 1890241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1890227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945128 + 945129.

It is an arithmetic number, because the mean of its divisors is an integer number (945129).

2^1890257 is an apocalyptic number.

It is an amenable number.

1890257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890257 is an equidigital number, since it uses as much as digits as its factorization.

1890257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1890257 is about 1374.8661753058. The cubic root of 1890257 is about 123.6441628160.

The spelling of 1890257 in words is "one million, eight hundred ninety thousand, two hundred fifty-seven".