1298311 has 12 divisors (see below), whose sum is σ = 1541136. Its totient is φ = 1071360.

The previous prime is 1298309. The next prime is 1298317. The reversal of 1298311 is 1138921.

1298311 = 298² + 299² + ... + 311².

It is not a de Polignac number, because 1298311 - 2¹ = 1298309 is a prime.

It is a super-2 number, since 2×1298311² = 3371222905442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298317) 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 in 11 ways as a sum of consecutive naturals, for example, 6631 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (128428).

2^1298311 is an apocalyptic number.

1298311 is a deficient number, since it is larger than the sum of its proper divisors (242825).

1298311 is an equidigital number, since it uses as much as digits as its factorization.

1298311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 231 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 1298311 is about 1139.4345088683. The cubic root of 1298311 is about 109.0920021145.

The spelling of 1298311 in words is "one million, two hundred ninety-eight thousand, three hundred eleven".