1278047 has 2 divisors, whose sum is σ = 1278048. Its totient is φ = 1278046.

The previous prime is 1278031. The next prime is 1278097. The reversal of 1278047 is 7408721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1278047 - 2⁴ = 1278031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1278007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639023 + 639024.

It is an arithmetic number, because the mean of its divisors is an integer number (639024).

2^1278047 is an apocalyptic number.

1278047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278047 is an equidigital number, since it uses as much as digits as its factorization.

1278047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 1278047 is about 1130.5074082022. The cubic root of 1278047 is about 108.5214551213.

The spelling of 1278047 in words is "one million, two hundred seventy-eight thousand, forty-seven".