1215760 has 80 divisors (see below), whose sum is σ = 3499776. Its totient is φ = 382464.

The previous prime is 1215743. The next prime is 1215769. The reversal of 1215760 is 675121.

1215760 = T₁₆₀ + T₁₆₁ + ... + T₂₂₄.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215769) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7197 + ... + 7363.

2^1215760 is an apocalyptic number.

1215760 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 1215760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749888).

1215760 is an abundant number, since it is smaller than the sum of its proper divisors (2284016).

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

1215760 is a wasteful number, since it uses less digits than its factorization.

1215760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1215760 is about 1102.6150733597. The cubic root of 1215760 is about 106.7290433772.

The spelling of 1215760 in words is "one million, two hundred fifteen thousand, seven hundred sixty".