1215180 has 72 divisors (see below), whose sum is σ = 3795792. Its totient is φ = 314496.

The previous prime is 1215173. The next prime is 1215197. The reversal of 1215180 is 815121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7662 + ... + 7818.

2^1215180 is an apocalyptic number.

1215180 is a gapful number since it is divisible by the number (10) 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 1215180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1897896).

1215180 is an abundant number, since it is smaller than the sum of its proper divisors (2580612).

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

1215180 is a wasteful number, since it uses less digits than its factorization.

1215180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1215180 is about 1102.3520308867. The cubic root of 1215180 is about 106.7120683461.

The spelling of 1215180 in words is "one million, two hundred fifteen thousand, one hundred eighty".