1305345 has 16 divisors (see below), whose sum is σ = 2211840. Its totient is φ = 655104.

The previous prime is 1305307. The next prime is 1305371. The reversal of 1305345 is 5435031.

It is not a de Polignac number, because 1305345 - 2⁹ = 1304833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305 + ... + 2814.

It is an arithmetic number, because the mean of its divisors is an integer number (138240).

2^1305345 is an apocalyptic number.

1305345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305345 is a deficient number, since it is larger than the sum of its proper divisors (906495).

1305345 is a wasteful number, since it uses less digits than its factorization.

1305345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 1305345 is about 1142.5169582987. The cubic root of 1305345 is about 109.2886605700.

The spelling of 1305345 in words is "one million, three hundred five thousand, three hundred forty-five".