1248991 has 2 divisors, whose sum is σ = 1248992. Its totient is φ = 1248990.

The previous prime is 1248979. The next prime is 1249013. The reversal of 1248991 is 1998421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1248991 - 2¹¹ = 1246943 is a prime.

It is a pancake number, because a pancake can be divided into 1248991 parts by 1580 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248941) 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, 624495 + 624496.

It is an arithmetic number, because the mean of its divisors is an integer number (624496).

2^1248991 is an apocalyptic number.

1248991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248991 is an equidigital number, since it uses as much as digits as its factorization.

1248991 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 1248991 is about 1117.5826591353. The cubic root of 1248991 is about 107.6927423713.

The spelling of 1248991 in words is "one million, two hundred forty-eight thousand, nine hundred ninety-one".