1215580 has 12 divisors (see below), whose sum is σ = 2552760. Its totient is φ = 486224.

The previous prime is 1215569. The next prime is 1215583. The reversal of 1215580 is 855121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215583) 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, 30370 + ... + 30409.

It is an arithmetic number, because the mean of its divisors is an integer number (212730).

2^1215580 is an apocalyptic number.

1215580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215580 is an abundant number, since it is smaller than the sum of its proper divisors (1337180).

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

1215580 is a wasteful number, since it uses less digits than its factorization.

1215580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60788 (or 60786 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1215580 is about 1102.5334462047. The cubic root of 1215580 is about 106.7237758420.

The spelling of 1215580 in words is "one million, two hundred fifteen thousand, five hundred eighty".