1284979 has 8 divisors (see below), whose sum is σ = 1373328. Its totient is φ = 1198080.

The previous prime is 1284977. The next prime is 1284991. The reversal of 1284979 is 9794821.

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 1284979 - 2¹ = 1284977 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (171666).

2^1284979 is an apocalyptic number.

1284979 is a deficient number, since it is larger than the sum of its proper divisors (88349).

1284979 is a wasteful number, since it uses less digits than its factorization.

1284979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 36288, while the sum is 40.

The square root of 1284979 is about 1133.5691421347. The cubic root of 1284979 is about 108.7173046558.

The spelling of 1284979 in words is "one million, two hundred eighty-four thousand, nine hundred seventy-nine".