1243601128 has 64 divisors (see below), whose sum is σ = 2919628800. Its totient is φ = 482435520.

The previous prime is 1243601077. The next prime is 1243601131. The reversal of 1243601128 is 8211063421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1243601096 and 1243601105.

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, 143001 + ... + 151447.

It is an arithmetic number, because the mean of its divisors is an integer number (45619200).

Almost surely, 2^1243601128 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 1243601128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459814400).

1243601128 is an abundant number, since it is smaller than the sum of its proper divisors (1676027672).

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

1243601128 is a wasteful number, since it uses less digits than its factorization.

1243601128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8710 (or 8706 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1243601128 is about 35264.7292347467. The cubic root of 1243601128 is about 1075.3760726398.

Adding to 1243601128 its reverse (8211063421), we get a palindrome (9454664549).

The spelling of 1243601128 in words is "one billion, two hundred forty-three million, six hundred one thousand, one hundred twenty-eight".