1298560 has 32 divisors (see below), whose sum is σ = 3105900. Its totient is φ = 519168.

The previous prime is 1298551. The next prime is 1298573. The reversal of 1298560 is 658921.

It can be written as a sum of positive squares in 2 ways, for example, as 1201216 + 97344 = 1096^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 375 + ... + 1654.

2^1298560 is an apocalyptic number.

1298560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298560 is an abundant number, since it is smaller than the sum of its proper divisors (1807340).

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

1298560 is an equidigital number, since it uses as much as digits as its factorization.

1298560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1298560 is about 1139.5437683564. The cubic root of 1298560 is about 109.0989758345.

The spelling of 1298560 in words is "one million, two hundred ninety-eight thousand, five hundred sixty".