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9725 = 52389
BaseRepresentation
bin10010111111101
3111100012
42113331
5302400
6113005
740232
oct22775
914305
109725
117341
125765
134571
143789
152d35
hex25fd

9725 has 6 divisors (see below), whose sum is σ = 12090. Its totient is φ = 7760.

The previous prime is 9721. The next prime is 9733. The reversal of 9725 is 5279.

It can be written as a sum of positive squares in 3 ways, for example, as 121 + 9604 = 11^2 + 98^2 .

It is not a de Polignac number, because 9725 - 22 = 9721 is a prime.

It is a d-powerful number, because it can be written as 94 + 25 + 7 + 55 .

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 9725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721) 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, 170 + ... + 219.

It is an arithmetic number, because the mean of its divisors is an integer number (2015).

29725 is an apocalyptic number.

It is an amenable number.

9725 is a deficient number, since it is larger than the sum of its proper divisors (2365).

9725 is a wasteful number, since it uses less digits than its factorization.

9725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 394 counting only the distinct ones).

The product of its digits is 630, while the sum is 23.

The square root of 9725 is about 98.6154146166. The cubic root of 9725 is about 21.3450185549.

Multiplying 9725 by its product of digits (630), we get a triangular number (6126750 = T3500).

The spelling of 9725 in words is "nine thousand, seven hundred twenty-five".

Divisors: 1 5 25 389 1945 9725