305725 has 12 divisors (see below), whose sum is σ = 433504. Its totient is φ = 209520.

The previous prime is 305719. The next prime is 305741. The reversal of 305725 is 527503.

It is not a de Polignac number, because 305725 - 2³ = 305717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 305696 and 305705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 699 + ... + 1048.

2³⁰⁵⁷²⁵ is an apocalyptic number.

305725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

305725 is the 350-th heptagonal number.

It is an amenable number.

305725 is a deficient number, since it is larger than the sum of its proper divisors (127779).

305725 is a wasteful number, since it uses less digits than its factorization.

305725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 305725 is about 552.9240454167. The cubic root of 305725 is about 67.3664483279.

The spelling of 305725 in words is "three hundred five thousand, seven hundred twenty-five".