30725 has 6 divisors (see below), whose sum is σ = 38130. Its totient is φ = 24560.

The previous prime is 30713. The next prime is 30727. The reversal of 30725 is 52703.

It can be written as a sum of positive squares in 3 ways, for example, as 9409 + 21316 = 97^2 + 146^2 .

It is not a de Polignac number, because 30725 - 2⁶ = 30661 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590 + ... + 639.

It is an arithmetic number, because the mean of its divisors is an integer number (6355).

2³⁰⁷²⁵ is an apocalyptic number.

It is an amenable number.

30725 is a deficient number, since it is larger than the sum of its proper divisors (7405).

30725 is a wasteful number, since it uses less digits than its factorization.

30725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 30725 is about 175.2854814296. The cubic root of 30725 is about 31.3206401985.

The spelling of 30725 in words is "thirty thousand, seven hundred twenty-five".