1305864 has 48 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 372960.

The previous prime is 1305823. The next prime is 1305869. The reversal of 1305864 is 4685031.

It is not an unprimeable number, because it can be changed into a prime (1305869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 792 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2^1305864 is an apocalyptic number.

1305864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1305864 is an abundant number, since it is smaller than the sum of its proper divisors (2737656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1305864 is a wasteful number, since it uses less digits than its factorization.

1305864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610 (or 2603 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1305864 is about 1142.7440658345. The cubic root of 1305864 is about 109.3031428970.

The spelling of 1305864 in words is "one million, three hundred five thousand, eight hundred sixty-four".