1255978 has 8 divisors (see below), whose sum is σ = 1889280. Its totient is φ = 626220.

The previous prime is 1255967. The next prime is 1255993. The reversal of 1255978 is 8795521.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (236160).

2^1255978 is an apocalyptic number.

1255978 is a deficient number, since it is larger than the sum of its proper divisors (633302).

1255978 is a wasteful number, since it uses less digits than its factorization.

1255978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its digits is 25200, while the sum is 37.

The square root of 1255978 is about 1120.7042428759. The cubic root of 1255978 is about 107.8931842852.

The spelling of 1255978 in words is "one million, two hundred fifty-five thousand, nine hundred seventy-eight".