1278793 has 4 divisors (see below), whose sum is σ = 1281280. Its totient is φ = 1276308.

The previous prime is 1278787. The next prime is 1278799. The reversal of 1278793 is 3978721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1278787) and next prime (1278799).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1278793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278799) 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, 153 + ... + 1606.

It is an arithmetic number, because the mean of its divisors is an integer number (320320).

2^1278793 is an apocalyptic number.

It is an amenable number.

1278793 is a deficient number, since it is larger than the sum of its proper divisors (2487).

1278793 is an equidigital number, since it uses as much as digits as its factorization.

1278793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486.

The product of its digits is 21168, while the sum is 37.

The square root of 1278793 is about 1130.8373004106. The cubic root of 1278793 is about 108.5425657844.

It can be divided in two parts, 12787 and 93, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 1278793 in words is "one million, two hundred seventy-eight thousand, seven hundred ninety-three".