1248979 has 2 divisors, whose sum is σ = 1248980. Its totient is φ = 1248978.

The previous prime is 1248977. The next prime is 1248991. The reversal of 1248979 is 9798421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1248979 - 2¹ = 1248977 is a prime.

Together with 1248977, it forms a pair of twin primes.

It is an Ulam number.

1248979 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1248977) 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, 624489 + 624490.

It is an arithmetic number, because the mean of its divisors is an integer number (624490).

2^1248979 is an apocalyptic number.

1248979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248979 is an equidigital number, since it uses as much as digits as its factorization.

1248979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 1248979 is about 1117.5772903920. The cubic root of 1248979 is about 107.6923974751.

The spelling of 1248979 in words is "one million, two hundred forty-eight thousand, nine hundred seventy-nine".