1298491 has 2 divisors, whose sum is σ = 1298492. Its totient is φ = 1298490.

The previous prime is 1298489. The next prime is 1298537. The reversal of 1298491 is 1948921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1298491 - 2¹ = 1298489 is a prime.

Together with 1298489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1298191) 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, 649245 + 649246.

It is an arithmetic number, because the mean of its divisors is an integer number (649246).

2^1298491 is an apocalyptic number.

1298491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298491 is an equidigital number, since it uses as much as digits as its factorization.

1298491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 1298491 is about 1139.5134926801. The cubic root of 1298491 is about 109.0970434471.

The spelling of 1298491 in words is "one million, two hundred ninety-eight thousand, four hundred ninety-one".