1240553445503 has 4 divisors (see below), whose sum is σ = 1240565252760. Its totient is φ = 1240541638248.

The previous prime is 1240553445487. The next prime is 1240553445517. The reversal of 1240553445503 is 3055443550421.

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

It is a cyclic number.

It is not a de Polignac number, because 1240553445503 - 2⁴ = 1240553445487 is a prime.

It is a super-2 number, since 2×1240553445503² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240553445553) 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, 5744600 + ... + 5956637.

It is an arithmetic number, because the mean of its divisors is an integer number (310141313190).

Almost surely, 2^{1240553445503} is an apocalyptic number.

1240553445503 is a deficient number, since it is larger than the sum of its proper divisors (11807257).

1240553445503 is a wasteful number, since it uses less digits than its factorization.

1240553445503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807256.

The product of its (nonzero) digits is 720000, while the sum is 41.

Adding to 1240553445503 its reverse (3055443550421), we get a palindrome (4295996995924).

The spelling of 1240553445503 in words is "one trillion, two hundred forty billion, five hundred fifty-three million, four hundred forty-five thousand, five hundred three".