1245760 has 56 divisors (see below), whose sum is σ = 3154680. Its totient is φ = 466944.

The previous prime is 1245721. The next prime is 1245763. The reversal of 1245760 is 675421.

It can be written as a sum of positive squares in 4 ways, for example, as 553536 + 692224 = 744^2 + 832^2 .

It is not an unprimeable number, because it can be changed into a prime (1245763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5326 + ... + 5554.

2^1245760 is an apocalyptic number.

1245760 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 1245760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577340).

1245760 is an abundant number, since it is smaller than the sum of its proper divisors (1908920).

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

1245760 is a wasteful number, since it uses less digits than its factorization.

1245760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1245760 is about 1116.1361924066. The cubic root of 1245760 is about 107.5997991548.

The spelling of 1245760 in words is "one million, two hundred forty-five thousand, seven hundred sixty".