1268731 has 2 divisors, whose sum is σ = 1268732. Its totient is φ = 1268730.

The previous prime is 1268713. The next prime is 1268741. The reversal of 1268731 is 1378621.

Together with previous prime (1268713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1268731 - 2¹⁷ = 1137659 is a prime.

It is a super-2 number, since 2×1268731² = 3219356700722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268731.

It is not a weakly prime, because it can be changed into another prime (1268741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634365 + 634366.

It is an arithmetic number, because the mean of its divisors is an integer number (634366).

2^1268731 is an apocalyptic number.

1268731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268731 is an equidigital number, since it uses as much as digits as its factorization.

1268731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 1268731 is about 1126.3795985368. The cubic root of 1268731 is about 108.2571319485.

The spelling of 1268731 in words is "one million, two hundred sixty-eight thousand, seven hundred thirty-one".