1243788 has 96 divisors (see below), whose sum is σ = 3838464. Its totient is φ = 304128.

The previous prime is 1243783. The next prime is 1243789. The reversal of 1243788 is 8873421.

It is not an unprimeable number, because it can be changed into a prime (1243783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18531 + ... + 18597.

It is an arithmetic number, because the mean of its divisors is an integer number (39984).

2^1243788 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 1243788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1919232).

1243788 is an abundant number, since it is smaller than the sum of its proper divisors (2594676).

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

1243788 is a wasteful number, since it uses less digits than its factorization.

1243788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 109 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 1243788 is about 1115.2524377916. The cubic root of 1243788 is about 107.5429934393.

The spelling of 1243788 in words is "one million, two hundred forty-three thousand, seven hundred eighty-eight".