1278497 has 8 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 1145200.

The previous prime is 1278493. The next prime is 1278527. The reversal of 1278497 is 7948721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1278497 - 2² = 1278493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1278497.

It is not an unprimeable number, because it can be changed into a prime (1278493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (176904).

2^1278497 is an apocalyptic number.

It is an amenable number.

1278497 is a deficient number, since it is larger than the sum of its proper divisors (136735).

1278497 is a wasteful number, since it uses less digits than its factorization.

1278497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719.

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

The square root of 1278497 is about 1130.7064163610. The cubic root of 1278497 is about 108.5341904183.

The spelling of 1278497 in words is "one million, two hundred seventy-eight thousand, four hundred ninety-seven".