1225984 has 18 divisors (see below), whose sum is σ = 2447690. Its totient is φ = 612864.

The previous prime is 1225981. The next prime is 1225997. The reversal of 1225984 is 4895221.

It can be written as a sum of positive squares in only one way, i.e., 774400 + 451584 = 880^2 + 672^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225981) by changing a digit.

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 as a sum of consecutive naturals, namely, 2139 + ... + 2650.

2^1225984 is an apocalyptic number.

It is an amenable number.

1225984 is a deficient number, since it is larger than the sum of its proper divisors (1221706).

1225984 is an frugal number, since it uses more digits than its factorization.

1225984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805 (or 4791 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 1225984 is about 1107.2416177149. The cubic root of 1225984 is about 107.0273898496.

It can be divided in two parts, 1225 and 984, that added together give a square (2209 = 47²).

The spelling of 1225984 in words is "one million, two hundred twenty-five thousand, nine hundred eighty-four".