1298831 has 2 divisors, whose sum is σ = 1298832. Its totient is φ = 1298830.

The previous prime is 1298819. The next prime is 1298849. The reversal of 1298831 is 1388921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298831 is a prime.

It is a super-2 number, since 2×1298831² = 3373923933122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649415 + 649416.

It is an arithmetic number, because the mean of its divisors is an integer number (649416).

2^1298831 is an apocalyptic number.

1298831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298831 is an equidigital number, since it uses as much as digits as its factorization.

1298831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 1298831 is about 1139.6626693895. The cubic root of 1298831 is about 109.1065646934.

The spelling of 1298831 in words is "one million, two hundred ninety-eight thousand, eight hundred thirty-one".