1320402123 has 24 divisors (see below), whose sum is σ = 1966947840. Its totient is φ = 853135920.

The previous prime is 1320402113. The next prime is 1320402133. The reversal of 1320402123 is 3212040231.

It is an interprime number because it is at equal distance from previous prime (1320402113) and next prime (1320402133).

It is not a de Polignac number, because 1320402123 - 2⁸ = 1320401867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320402096 and 1320402105.

It is not an unprimeable number, because it can be changed into a prime (1320402113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20190 + ... + 55212.

It is an arithmetic number, because the mean of its divisors is an integer number (81956160).

Almost surely, 2^1320402123 is an apocalyptic number.

1320402123 is a deficient number, since it is larger than the sum of its proper divisors (646545717).

1320402123 is a wasteful number, since it uses less digits than its factorization.

1320402123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35159 (or 35156 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1320402123 is about 36337.3378634154. The cubic root of 1320402123 is about 1097.0726914429.

Adding to 1320402123 its reverse (3212040231), we get a palindrome (4532442354).

The spelling of 1320402123 in words is "one billion, three hundred twenty million, four hundred two thousand, one hundred twenty-three".