1243505152 has 80 divisors (see below), whose sum is σ = 2601898200. Its totient is φ = 592936960.

The previous prime is 1243505129. The next prime is 1243505161. The reversal of 1243505152 is 2515053421.

It can be written as a sum of positive squares in 4 ways, for example, as 972441856 + 271063296 = 31184^2 + 16464^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1243505152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321002 + ... + 1321942.

Almost surely, 2^1243505152 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 1243505152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1300949100).

1243505152 is an abundant number, since it is smaller than the sum of its proper divisors (1358393048).

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

1243505152 is an frugal number, since it uses more digits than its factorization.

1243505152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1243505152 is about 35263.3684153967. The cubic root of 1243505152 is about 1075.3484075665.

Adding to 1243505152 its reverse (2515053421), we get a palindrome (3758558573).

The spelling of 1243505152 in words is "one billion, two hundred forty-three million, five hundred five thousand, one hundred fifty-two".