1215680 has 56 divisors (see below), whose sum is σ = 3017520. Its totient is φ = 465920.

The previous prime is 1215679. The next prime is 1215703. The reversal of 1215680 is 865121.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9215 + ... + 9345.

2^1215680 is an apocalyptic number.

1215680 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 1215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508760).

1215680 is an abundant number, since it is smaller than the sum of its proper divisors (1801840).

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

1215680 is a wasteful number, since it uses less digits than its factorization.

1215680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1215680 is about 1102.5787953702. The cubic root of 1215680 is about 106.7267023147.

The spelling of 1215680 in words is "one million, two hundred fifteen thousand, six hundred eighty".