1247988 has 48 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 350304.

The previous prime is 1247969. The next prime is 1248001. The reversal of 1247988 is 8897421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6883 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1247988 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 1247988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1247988 is an abundant number, since it is smaller than the sum of its proper divisors (2138892).

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

1247988 is a wasteful number, since it uses less digits than its factorization.

1247988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 274 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 1247988 is about 1117.1338326270. The cubic root of 1247988 is about 107.6639071629.

The spelling of 1247988 in words is "one million, two hundred forty-seven thousand, nine hundred eighty-eight".