1243040552 has 32 divisors (see below), whose sum is σ = 2514739080. Its totient is φ = 572624640.

The previous prime is 1243040549. The next prime is 1243040563. The reversal of 1243040552 is 2550403421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1058461156 + 184579396 = 32534^2 + 13586^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45218 + ... + 67310.

Almost surely, 2^1243040552 is an apocalyptic number.

It is an amenable number.

1243040552 is an abundant number, since it is smaller than the sum of its proper divisors (1271698528).

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

1243040552 is a wasteful number, since it uses less digits than its factorization.

1243040552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22653 (or 22649 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1243040552 is about 35256.7802273549. The cubic root of 1243040552 is about 1075.2144665306.

Adding to 1243040552 its reverse (2550403421), we get a palindrome (3793443973).

The spelling of 1243040552 in words is "one billion, two hundred forty-three million, forty thousand, five hundred fifty-two".