1299648 has 56 divisors (see below), whose sum is σ = 3933952. Its totient is φ = 370944.

The previous prime is 1299647. The next prime is 1299653. The reversal of 1299648 is 8469921.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (1299647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861 + ... + 1827.

2^1299648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1966976).

1299648 is an abundant number, since it is smaller than the sum of its proper divisors (2634304).

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

1299648 is an equidigital number, since it uses as much as digits as its factorization.

1299648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 979 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 1299648 is about 1140.0210524372. The cubic root of 1299648 is about 109.1294368965.

The spelling of 1299648 in words is "one million, two hundred ninety-nine thousand, six hundred forty-eight".