1278578 has 16 divisors (see below), whose sum is σ = 2206464. Its totient is φ = 544320.

The previous prime is 1278551. The next prime is 1278583. The reversal of 1278578 is 8758721.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3626 + ... + 3962.

It is an arithmetic number, because the mean of its divisors is an integer number (137904).

2^1278578 is an apocalyptic number.

1278578 is a deficient number, since it is larger than the sum of its proper divisors (927886).

1278578 is a wasteful number, since it uses less digits than its factorization.

1278578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617.

The product of its digits is 31360, while the sum is 38.

The square root of 1278578 is about 1130.7422341100. The cubic root of 1278578 is about 108.5364824544.

The spelling of 1278578 in words is "one million, two hundred seventy-eight thousand, five hundred seventy-eight".