1242245503399 has 4 divisors (see below), whose sum is σ = 1242696739536. Its totient is φ = 1241794267264.

The previous prime is 1242245503397. The next prime is 1242245503417. The reversal of 1242245503399 is 9933055422421.

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 1242245503399 - 2¹ = 1242245503397 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242245503391) 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, 225613939 + ... + 225619444.

It is an arithmetic number, because the mean of its divisors is an integer number (310674184884).

Almost surely, 2^{1242245503399} is an apocalyptic number.

1242245503399 is a deficient number, since it is larger than the sum of its proper divisors (451236137).

1242245503399 is an equidigital number, since it uses as much as digits as its factorization.

1242245503399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451236136.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 1242245503399 in words is "one trillion, two hundred forty-two billion, two hundred forty-five million, five hundred three thousand, three hundred ninety-nine".