1278419 has 2 divisors, whose sum is σ = 1278420. Its totient is φ = 1278418.

The previous prime is 1278401. The next prime is 1278437. The reversal of 1278419 is 9148721.

It is a balanced prime because it is at equal distance from previous prime (1278401) and next prime (1278437).

It is a cyclic number.

It is not a de Polignac number, because 1278419 - 2⁸ = 1278163 is a prime.

It is a super-2 number, since 2×1278419² = 3268710279122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1278439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639209 + 639210.

It is an arithmetic number, because the mean of its divisors is an integer number (639210).

2^1278419 is an apocalyptic number.

1278419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278419 is an equidigital number, since it uses as much as digits as its factorization.

1278419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 1278419 is about 1130.6719241230. The cubic root of 1278419 is about 108.5319831809.

The spelling of 1278419 in words is "one million, two hundred seventy-eight thousand, four hundred nineteen".