1278961 has 8 divisors (see below), whose sum is σ = 1413504. Its totient is φ = 1151040.

The previous prime is 1278911. The next prime is 1278983. The reversal of 1278961 is 1698721.

It is a happy number.

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 1278961 - 2¹⁷ = 1147889 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (176688).

2^1278961 is an apocalyptic number.

It is an amenable number.

1278961 is a deficient number, since it is larger than the sum of its proper divisors (134543).

1278961 is a wasteful number, since it uses less digits than its factorization.

1278961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311.

The product of its digits is 6048, while the sum is 34.

The square root of 1278961 is about 1130.9115792139. The cubic root of 1278961 is about 108.5473187957.

The spelling of 1278961 in words is "one million, two hundred seventy-eight thousand, nine hundred sixty-one".