1247648 has 24 divisors (see below), whose sum is σ = 2483712. Its totient is φ = 616896.

The previous prime is 1247641. The next prime is 1247651. The reversal of 1247648 is 8467421.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1247641) 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 3 ways as a sum of consecutive naturals, for example, 3911 + ... + 4217.

It is an arithmetic number, because the mean of its divisors is an integer number (103488).

2^1247648 is an apocalyptic number.

It is an amenable number.

1247648 is a deficient number, since it is larger than the sum of its proper divisors (1236064).

1247648 is a wasteful number, since it uses less digits than its factorization.

1247648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 436 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 1247648 is about 1116.9816471187. The cubic root of 1247648 is about 107.6541290098.

The spelling of 1247648 in words is "one million, two hundred forty-seven thousand, six hundred forty-eight".