1345251223451 has 4 divisors (see below), whose sum is σ = 1348059681600. Its totient is φ = 1342442765304.

The previous prime is 1345251223429. The next prime is 1345251223483. The reversal of 1345251223451 is 1543221525431.

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 1345251223451 - 2²⁶ = 1345184114587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1345251229451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404228356 + ... + 1404229313.

It is an arithmetic number, because the mean of its divisors is an integer number (337014920400).

Almost surely, 2^{1345251223451} is an apocalyptic number.

1345251223451 is a deficient number, since it is larger than the sum of its proper divisors (2808458149).

1345251223451 is an equidigital number, since it uses as much as digits as its factorization.

1345251223451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808458148.

The product of its digits is 144000, while the sum is 38.

Adding to 1345251223451 its reverse (1543221525431), we get a palindrome (2888472748882).

The spelling of 1345251223451 in words is "one trillion, three hundred forty-five billion, two hundred fifty-one million, two hundred twenty-three thousand, four hundred fifty-one".