1242451427243 has 4 divisors (see below), whose sum is σ = 1338024613968. Its totient is φ = 1146878240520.

The previous prime is 1242451427219. The next prime is 1242451427257. The reversal of 1242451427243 is 3427241542421.

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 1242451427243 - 2¹⁰ = 1242451426219 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 1242451427243.

It is not an unprimeable number, because it can be changed into a prime (1242451427293) 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, 47786593343 + ... + 47786593368.

It is an arithmetic number, because the mean of its divisors is an integer number (334506153492).

Almost surely, 2^{1242451427243} is an apocalyptic number.

1242451427243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1242451427243 is a deficient number, since it is larger than the sum of its proper divisors (95573186725).

1242451427243 is an equidigital number, since it uses as much as digits as its factorization.

1242451427243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95573186724.

The product of its digits is 430080, while the sum is 41.

Adding to 1242451427243 its reverse (3427241542421), we get a palindrome (4669692969664).

The spelling of 1242451427243 in words is "one trillion, two hundred forty-two billion, four hundred fifty-one million, four hundred twenty-seven thousand, two hundred forty-three".