1209504 has 48 divisors (see below), whose sum is σ = 3259872. Its totient is φ = 392448.

The previous prime is 1209491. The next prime is 1209517. The reversal of 1209504 is 4059021.

It is an interprime number because it is at equal distance from previous prime (1209491) and next prime (1209517).

It is a tau number, because it is divible by the number of its divisors (48).

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3982 + ... + 4274.

It is an arithmetic number, because the mean of its divisors is an integer number (67914).

2^1209504 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 1209504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1629936).

1209504 is an abundant number, since it is smaller than the sum of its proper divisors (2050368).

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

1209504 is a wasteful number, since it uses less digits than its factorization.

1209504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1209504 is about 1099.7745223454. The cubic root of 1209504 is about 106.5456613917.

The spelling of 1209504 in words is "one million, two hundred nine thousand, five hundred four".