1240113533 has 4 divisors (see below), whose sum is σ = 1241765568. Its totient is φ = 1238461500.

The previous prime is 1240113521. The next prime is 1240113559. The reversal of 1240113533 is 3353110421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1240113533 - 2²⁸ = 971678077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240113499 and 1240113508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240113503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824891 + ... + 826392.

It is an arithmetic number, because the mean of its divisors is an integer number (310441392).

Almost surely, 2^1240113533 is an apocalyptic number.

It is an amenable number.

1240113533 is a deficient number, since it is larger than the sum of its proper divisors (1652035).

1240113533 is an equidigital number, since it uses as much as digits as its factorization.

1240113533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652034.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1240113533 is about 35215.2457466933. The cubic root of 1240113533 is about 1074.3698583514.

Adding to 1240113533 its reverse (3353110421), we get a palindrome (4593223954).

The spelling of 1240113533 in words is "one billion, two hundred forty million, one hundred thirteen thousand, five hundred thirty-three".