1231440052 has 12 divisors (see below), whose sum is σ = 2155422276. Its totient is φ = 615605120.

The previous prime is 1231440047. The next prime is 1231440053. The reversal of 1231440052 is 2500441321.

It can be written as a sum of positive squares in 2 ways, for example, as 89946256 + 1141493796 = 9484^2 + 33786^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231440053) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1813 + ... + 49660.

It is an arithmetic number, because the mean of its divisors is an integer number (179618523).

Almost surely, 2^1231440052 is an apocalyptic number.

It is an amenable number.

1231440052 is a deficient number, since it is larger than the sum of its proper divisors (923982224).

1231440052 is a wasteful number, since it uses less digits than its factorization.

1231440052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57458 (or 57456 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1231440052 is about 35091.8801434178. The cubic root of 1231440052 is about 1071.8592451361.

Adding to 1231440052 its reverse (2500441321), we get a palindrome (3731881373).

The spelling of 1231440052 in words is "one billion, two hundred thirty-one million, four hundred forty thousand, fifty-two".