1306402423 has 4 divisors (see below), whose sum is σ = 1314225360. Its totient is φ = 1298579488.

The previous prime is 1306402351. The next prime is 1306402453. The reversal of 1306402423 is 3242046031.

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 1306402423 - 2⁹ = 1306401911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306402453) 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, 3911218 + ... + 3911551.

It is an arithmetic number, because the mean of its divisors is an integer number (328556340).

Almost surely, 2^1306402423 is an apocalyptic number.

1306402423 is a deficient number, since it is larger than the sum of its proper divisors (7822937).

1306402423 is an equidigital number, since it uses as much as digits as its factorization.

1306402423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822936.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1306402423 is about 36144.1893393668. The cubic root of 1306402423 is about 1093.1816315419.

Adding to 1306402423 its reverse (3242046031), we get a palindrome (4548448454).

The spelling of 1306402423 in words is "one billion, three hundred six million, four hundred two thousand, four hundred twenty-three".