1258217 has 2 divisors, whose sum is σ = 1258218. Its totient is φ = 1258216.

The previous prime is 1258211. The next prime is 1258219. The reversal of 1258217 is 7128521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1125721 + 132496 = 1061^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1258217 - 2⁸ = 1257961 is a prime.

It is a super-2 number, since 2×1258217² = 3166220038178, which contains 22 as substring.

Together with 1258219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1258211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629108 + 629109.

It is an arithmetic number, because the mean of its divisors is an integer number (629109).

2^1258217 is an apocalyptic number.

It is an amenable number.

1258217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258217 is an equidigital number, since it uses as much as digits as its factorization.

1258217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 1258217 is about 1121.7027235413. The cubic root of 1258217 is about 107.9572590363.

The spelling of 1258217 in words is "one million, two hundred fifty-eight thousand, two hundred seventeen".