1306923 has 4 divisors (see below), whose sum is σ = 1742568. Its totient is φ = 871280.

The previous prime is 1306913. The next prime is 1306933. The reversal of 1306923 is 3296031.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1306913) and next prime (1306933).

It is a cyclic number.

It is not a de Polignac number, because 1306923 - 2⁵ = 1306891 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1306893 and 1306902.

It is not an unprimeable number, because it can be changed into a prime (1306913) 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, 217818 + ... + 217823.

It is an arithmetic number, because the mean of its divisors is an integer number (435642).

2^1306923 is an apocalyptic number.

1306923 is a deficient number, since it is larger than the sum of its proper divisors (435645).

1306923 is an equidigital number, since it uses as much as digits as its factorization.

1306923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435644.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 1306923 is about 1143.2073302774. The cubic root of 1306923 is about 109.3326816423.

The spelling of 1306923 in words is "one million, three hundred six thousand, nine hundred twenty-three".