1305423 has 16 divisors (see below), whose sum is σ = 2210560. Its totient is φ = 745848.

The previous prime is 1305401. The next prime is 1305427. The reversal of 1305423 is 3245031.

It is not a de Polignac number, because 1305423 - 2⁵ = 1305391 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1305396 and 1305405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3265 + ... + 3642.

It is an arithmetic number, because the mean of its divisors is an integer number (138160).

2^1305423 is an apocalyptic number.

1305423 is a deficient number, since it is larger than the sum of its proper divisors (905137).

1305423 is an equidigital number, since it uses as much as digits as its factorization.

1305423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923 (or 6917 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1305423 is about 1142.5510929495. The cubic root of 1305423 is about 109.2908373498.

It can be divided in two parts, 1305 and 423, that added together give a cube (1728 = 12³).

The spelling of 1305423 in words is "one million, three hundred five thousand, four hundred twenty-three".