1220504 has 8 divisors (see below), whose sum is σ = 2288460. Its totient is φ = 610248.

The previous prime is 1220497. The next prime is 1220507. The reversal of 1220504 is 4050221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220507) by changing a digit.

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 as a sum of consecutive naturals, namely, 76274 + ... + 76289.

2^1220504 is an apocalyptic number.

It is an amenable number.

1220504 is a deficient number, since it is larger than the sum of its proper divisors (1067956).

1220504 is a wasteful number, since it uses less digits than its factorization.

1220504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152569 (or 152565 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1220504 is about 1104.7642282406. The cubic root of 1220504 is about 106.8676851690.

Adding to 1220504 its reverse (4050221), we get a palindrome (5270725).

The spelling of 1220504 in words is "one million, two hundred twenty thousand, five hundred four".