1243928 has 32 divisors (see below), whose sum is σ = 2704800. Its totient is φ = 525312.

The previous prime is 1243927. The next prime is 1243933. The reversal of 1243928 is 8293421.

It is a self number, because there is not a number n which added to its sum of digits gives 1243928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243927) 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 7 ways as a sum of consecutive naturals, for example, 5318 + ... + 5546.

It is an arithmetic number, because the mean of its divisors is an integer number (84525).

2^1243928 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 1243928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1352400).

1243928 is an abundant number, since it is smaller than the sum of its proper divisors (1460872).

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

1243928 is a wasteful number, since it uses less digits than its factorization.

1243928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 335 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 1243928 is about 1115.3152020841. The cubic root of 1243928 is about 107.5470282787.

The spelling of 1243928 in words is "one million, two hundred forty-three thousand, nine hundred twenty-eight".