1213504 has 28 divisors (see below), whose sum is σ = 2452624. Its totient is φ = 595584.

The previous prime is 1213483. The next prime is 1213517. The reversal of 1213504 is 4053121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4147 + ... + 4429.

2^1213504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1226312).

1213504 is an abundant number, since it is smaller than the sum of its proper divisors (1239120).

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

1213504 is an equidigital number, since it uses as much as digits as its factorization.

1213504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1213504 is about 1101.5915758574. The cubic root of 1213504 is about 106.6629859841.

Adding to 1213504 its reverse (4053121), we get a palindrome (5266625).

The spelling of 1213504 in words is "one million, two hundred thirteen thousand, five hundred four".