1240423524013 has 4 divisors (see below), whose sum is σ = 1270677756348. Its totient is φ = 1210169291680.

The previous prime is 1240423524007. The next prime is 1240423524029. The reversal of 1240423524013 is 3104253240421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335105527689 + 905317996324 = 578883^2 + 951482^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240423524013 - 2⁵ = 1240423523981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240423524083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15127116106 + ... + 15127116187.

It is an arithmetic number, because the mean of its divisors is an integer number (317669439087).

Almost surely, 2^{1240423524013} is an apocalyptic number.

It is an amenable number.

1240423524013 is a deficient number, since it is larger than the sum of its proper divisors (30254232335).

1240423524013 is an equidigital number, since it uses as much as digits as its factorization.

1240423524013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30254232334.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 1240423524013 its reverse (3104253240421), we get a palindrome (4344676764434).

The spelling of 1240423524013 in words is "one trillion, two hundred forty billion, four hundred twenty-three million, five hundred twenty-four thousand, thirteen".