1240345505125 has 24 divisors (see below), whose sum is σ = 1633710318552. Its totient is φ = 940051296000.

The previous prime is 1240345505123. The next prime is 1240345505129. The reversal of 1240345505125 is 5215055430421.

It can be written as a sum of positive squares in 4 ways, for example, as 770562081 + 1239574943044 = 27759^2 + 1113362^2 .

It is not a de Polignac number, because 1240345505125 - 2¹ = 1240345505123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240345505123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13698316 + ... + 13788565.

It is an arithmetic number, because the mean of its divisors is an integer number (68071263273).

Almost surely, 2^{1240345505125} is an apocalyptic number.

It is an amenable number.

1240345505125 is a deficient number, since it is larger than the sum of its proper divisors (393364813427).

1240345505125 is an equidigital number, since it uses as much as digits as its factorization.

1240345505125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27486934 (or 27486905 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 1240345505125 in words is "one trillion, two hundred forty billion, three hundred forty-five million, five hundred five thousand, one hundred twenty-five".