1305872 has 20 divisors (see below), whose sum is σ = 2679516. Its totient is φ = 614400.

The previous prime is 1305869. The next prime is 1305881. The reversal of 1305872 is 2785031.

It can be written as a sum of positive squares in 2 ways, for example, as 891136 + 414736 = 944^2 + 644^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129 + ... + 2672.

2^1305872 is an apocalyptic number.

It is an amenable number.

1305872 is an abundant number, since it is smaller than the sum of its proper divisors (1373644).

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

1305872 is a wasteful number, since it uses less digits than its factorization.

1305872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4820 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1305872 is about 1142.7475661755. The cubic root of 1305872 is about 109.3033661012.

The spelling of 1305872 in words is "one million, three hundred five thousand, eight hundred seventy-two".