1285231 has 2 divisors, whose sum is σ = 1285232. Its totient is φ = 1285230.

The previous prime is 1285223. The next prime is 1285237. The reversal of 1285231 is 1325821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1285231 - 2³ = 1285223 is a prime.

It is a super-2 number, since 2×1285231² = 3303637446722, 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 (1285237) 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, 642615 + 642616.

It is an arithmetic number, because the mean of its divisors is an integer number (642616).

2^1285231 is an apocalyptic number.

1285231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285231 is an equidigital number, since it uses as much as digits as its factorization.

1285231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 1285231 is about 1133.6802900289. The cubic root of 1285231 is about 108.7244111195.

It can be divided in two parts, 1285 and 231, that multiplied together give a triangular number (296835 = T₇₇₀).

The spelling of 1285231 in words is "one million, two hundred eighty-five thousand, two hundred thirty-one".