1248779 has 4 divisors (see below), whose sum is σ = 1427184. Its totient is φ = 1070376.

The previous prime is 1248757. The next prime is 1248781. The reversal of 1248779 is 9778421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9778421 = 1249 ⋅7829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89192 + ... + 89205.

It is an arithmetic number, because the mean of its divisors is an integer number (356796).

2^1248779 is an apocalyptic number.

1248779 is a deficient number, since it is larger than the sum of its proper divisors (178405).

1248779 is an equidigital number, since it uses as much as digits as its factorization.

1248779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178404.

The product of its digits is 28224, while the sum is 38.

The square root of 1248779 is about 1117.4878075398. The cubic root of 1248779 is about 107.6866488785.

The spelling of 1248779 in words is "one million, two hundred forty-eight thousand, seven hundred seventy-nine".