1215552 has 56 divisors (see below), whose sum is σ = 3470656. Its totient is φ = 373248.

The previous prime is 1215521. The next prime is 1215553. The reversal of 1215552 is 2555121.

It is not an unprimeable number, because it can be changed into a prime (1215553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2253 + ... + 2739.

It is an arithmetic number, because the mean of its divisors is an integer number (61976).

2^1215552 is an apocalyptic number.

1215552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1735328).

1215552 is an abundant number, since it is smaller than the sum of its proper divisors (2255104).

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

1215552 is a wasteful number, since it uses less digits than its factorization.

1215552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 505 counting only the distinct ones).

The product of its digits is 500, while the sum is 21.

The square root of 1215552 is about 1102.5207481041. The cubic root of 1215552 is about 106.7229564009.

It can be divided in two parts, 12 and 15552, that multiplied together give a square (186624 = 432²).

The spelling of 1215552 in words is "one million, two hundred fifteen thousand, five hundred fifty-two".