1868257 has 2 divisors, whose sum is σ = 1868258. Its totient is φ = 1868256.

The previous prime is 1868239. The next prime is 1868261. The reversal of 1868257 is 7528681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938961 + 929296 = 969^2 + 964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868257 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1868287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934128 + 934129.

It is an arithmetic number, because the mean of its divisors is an integer number (934129).

2^1868257 is an apocalyptic number.

It is an amenable number.

1868257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868257 is an equidigital number, since it uses as much as digits as its factorization.

1868257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 1868257 is about 1366.8419806254. The cubic root of 1868257 is about 123.1626068912.

The spelling of 1868257 in words is "one million, eight hundred sixty-eight thousand, two hundred fifty-seven".