1283978 has 8 divisors (see below), whose sum is σ = 1962468. Its totient is φ = 629824.

The previous prime is 1283969. The next prime is 1283981. The reversal of 1283978 is 8793821.

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 289 = 1133^2 + 17^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5951 + ... + 6162.

2^1283978 is an apocalyptic number.

1283978 is a deficient number, since it is larger than the sum of its proper divisors (678490).

1283978 is a wasteful number, since it uses less digits than its factorization.

1283978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168.

The product of its digits is 24192, while the sum is 38.

The square root of 1283978 is about 1133.1275303336. The cubic root of 1283978 is about 108.6890670237.

The spelling of 1283978 in words is "one million, two hundred eighty-three thousand, nine hundred seventy-eight".