1280231 has 2 divisors, whose sum is σ = 1280232. Its totient is φ = 1280230.

The previous prime is 1280221. The next prime is 1280267. The reversal of 1280231 is 1320821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280231 is a prime.

It is a super-2 number, since 2×1280231² = 3277982826722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280221) 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, 640115 + 640116.

It is an arithmetic number, because the mean of its divisors is an integer number (640116).

2^1280231 is an apocalyptic number.

1280231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280231 is an equidigital number, since it uses as much as digits as its factorization.

1280231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1280231 is about 1131.4729338345. The cubic root of 1280231 is about 108.5832358383.

The spelling of 1280231 in words is "one million, two hundred eighty thousand, two hundred thirty-one".