1321245423 has 24 divisors (see below), whose sum is σ = 2090415600. Its totient is φ = 800427264.

The previous prime is 1321245413. The next prime is 1321245473. The reversal of 1321245423 is 3245421231.

It is not a de Polignac number, because 1321245423 - 2⁴ = 1321245407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321245413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144453 + ... + 153326.

It is an arithmetic number, because the mean of its divisors is an integer number (87100650).

Almost surely, 2^1321245423 is an apocalyptic number.

1321245423 is a deficient number, since it is larger than the sum of its proper divisors (769170177).

1321245423 is a wasteful number, since it uses less digits than its factorization.

1321245423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297831 (or 297828 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1321245423 is about 36348.9397782109. The cubic root of 1321245423 is about 1097.3061972053.

Adding to 1321245423 its reverse (3245421231), we get a palindrome (4566666654).

The spelling of 1321245423 in words is "one billion, three hundred twenty-one million, two hundred forty-five thousand, four hundred twenty-three".