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3725 = 52149
BaseRepresentation
bin111010001101
312002222
4322031
5104400
625125
713601
oct7215
95088
103725
112887
1221a5
131907
141501
151185
hexe8d

3725 has 6 divisors (see below), whose sum is σ = 4650. Its totient is φ = 2960.

The previous prime is 3719. The next prime is 3727. The reversal of 3725 is 5273.

It can be written as a sum of positive squares in 3 ways, for example, as 4 + 3721 = 2^2 + 61^2 .

It is not a de Polignac number, because 3725 - 24 = 3709 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 34 + 29 + 7 + 55 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50 + ... + 99.

It is an arithmetic number, because the mean of its divisors is an integer number (775).

23725 is an apocalyptic number.

3725 is the 50-th pentagonal number.

It is an amenable number.

3725 is a deficient number, since it is larger than the sum of its proper divisors (925).

3725 is a wasteful number, since it uses less digits than its factorization.

3725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 154 counting only the distinct ones).

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

The square root of 3725 is about 61.0327780787. The cubic root of 3725 is about 15.5015607169.

Adding to 3725 its reverse (5273), we get a palindrome (8998).

The spelling of 3725 in words is "three thousand, seven hundred twenty-five".

Divisors: 1 5 25 149 745 3725