1243128 has 16 divisors (see below), whose sum is σ = 3107880. Its totient is φ = 414368.

The previous prime is 1243111. The next prime is 1243129. The reversal of 1243128 is 8213421.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25875 + ... + 25922.

2^1243128 is an apocalyptic number.

It is an amenable number.

1243128 is an abundant number, since it is smaller than the sum of its proper divisors (1864752).

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

1243128 is a wasteful number, since it uses less digits than its factorization.

1243128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51806 (or 51802 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1243128 is about 1114.9565013937. The cubic root of 1243128 is about 107.5239679747.

Adding to 1243128 its reverse (8213421), we get a palindrome (9456549).

The spelling of 1243128 in words is "one million, two hundred forty-three thousand, one hundred twenty-eight".