1215104 has 32 divisors (see below), whose sum is σ = 2643840. Its totient is φ = 551680.

The previous prime is 1215103. The next prime is 1215121. The reversal of 1215104 is 4015121.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1215103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977 + ... + 1839.

It is an arithmetic number, because the mean of its divisors is an integer number (82620).

2^1215104 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 1215104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321920).

1215104 is an abundant number, since it is smaller than the sum of its proper divisors (1428736).

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

1215104 is an equidigital number, since it uses as much as digits as its factorization.

1215104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1215104 is about 1102.3175586010. The cubic root of 1215104 is about 106.7098436314.

It can be divided in two parts, 121 and 5104, that added together give a palindrome (5225).

The spelling of 1215104 in words is "one million, two hundred fifteen thousand, one hundred four".