1242040512533 has 4 divisors (see below), whose sum is σ = 1246623688128. Its totient is φ = 1237457336940.

The previous prime is 1242040512511. The next prime is 1242040512547. The reversal of 1242040512533 is 3352150402421.

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 1242040512533 - 2¹⁸ = 1242040250389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242040512533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242040512563) 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, 2291587391 + ... + 2291587932.

It is an arithmetic number, because the mean of its divisors is an integer number (311655922032).

Almost surely, 2^{1242040512533} is an apocalyptic number.

It is an amenable number.

1242040512533 is a deficient number, since it is larger than the sum of its proper divisors (4583175595).

1242040512533 is an equidigital number, since it uses as much as digits as its factorization.

1242040512533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583175594.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 1242040512533 its reverse (3352150402421), we get a palindrome (4594190914954).

The spelling of 1242040512533 in words is "one trillion, two hundred forty-two billion, forty million, five hundred twelve thousand, five hundred thirty-three".