1220884 has 18 divisors (see below), whose sum is σ = 2485770. Its totient is φ = 523152.

The previous prime is 1220839. The next prime is 1220893. The reversal of 1220884 is 4880221.

1220884 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 176400 = 1022^2 + 420^2 .

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2919 + ... + 3310.

2^1220884 is an apocalyptic number.

1220884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220884 is an abundant number, since it is smaller than the sum of its proper divisors (1264886).

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

1220884 is a wasteful number, since it uses less digits than its factorization.

1220884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247 (or 6238 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 1220884 is about 1104.9361972530. The cubic root of 1220884 is about 106.8787749883.

The spelling of 1220884 in words is "one million, two hundred twenty thousand, eight hundred eighty-four".