1298923 has 2 divisors, whose sum is σ = 1298924. Its totient is φ = 1298922.

The previous prime is 1298911. The next prime is 1298951. The reversal of 1298923 is 3298921.

It is a weak prime.

It is an emirp because it is prime and its reverse (3298921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298923 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1298963) 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, 649461 + 649462.

It is an arithmetic number, because the mean of its divisors is an integer number (649462).

2^1298923 is an apocalyptic number.

1298923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298923 is an equidigital number, since it uses as much as digits as its factorization.

1298923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 1298923 is about 1139.7030314955. The cubic root of 1298923 is about 109.1091407450.

The spelling of 1298923 in words is "one million, two hundred ninety-eight thousand, nine hundred twenty-three".