1278984 has 64 divisors (see below), whose sum is σ = 3824640. Its totient is φ = 348480.

The previous prime is 1278983. The next prime is 1278997. The reversal of 1278984 is 4898721.

1278984 = T₆₀₁ + T₆₀₂ + ... + T₆₀₇.

It is not an unprimeable number, because it can be changed into a prime (1278983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3699 + ... + 4029.

It is an arithmetic number, because the mean of its divisors is an integer number (59760).

2^1278984 is an apocalyptic number.

1278984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912320).

1278984 is an abundant number, since it is smaller than the sum of its proper divisors (2545656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278984 is a wasteful number, since it uses less digits than its factorization.

1278984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 366 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 1278984 is about 1130.9217479561. The cubic root of 1278984 is about 108.5479694732.

The spelling of 1278984 in words is "one million, two hundred seventy-eight thousand, nine hundred eighty-four".