1928257 has 2 divisors, whose sum is σ = 1928258. Its totient is φ = 1928256.

The previous prime is 1928237. The next prime is 1928261. The reversal of 1928257 is 7528291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 287296 = 1281^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928257 - 2¹⁵ = 1895489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1928207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964128 + 964129.

It is an arithmetic number, because the mean of its divisors is an integer number (964129).

2^1928257 is an apocalyptic number.

It is an amenable number.

1928257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928257 is an equidigital number, since it uses as much as digits as its factorization.

1928257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 1928257 is about 1388.6169378198. The cubic root of 1928257 is about 124.4672150143.

Adding to 1928257 its sum of digits (34), we get a palindrome (1928291).

The spelling of 1928257 in words is "one million, nine hundred twenty-eight thousand, two hundred fifty-seven".