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40725 = 3252181
BaseRepresentation
bin1001111100010101
32001212100
421330111
52300400
6512313
7226506
oct117425
961770
1040725
1128663
121b699
13156c9
1410bad
15c100
hex9f15

40725 has 18 divisors (see below), whose sum is σ = 73346. Its totient is φ = 21600.

The previous prime is 40709. The next prime is 40739. The reversal of 40725 is 52704.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 324 + 40401 = 18^2 + 201^2 .

It is not a de Polignac number, because 40725 - 24 = 40709 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 40698 and 40707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 135 + ... + 315.

240725 is an apocalyptic number.

40725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40725 is a deficient number, since it is larger than the sum of its proper divisors (32621).

40725 is a wasteful number, since it uses less digits than its factorization.

40725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 40725 is about 201.8043607061. The cubic root of 40725 is about 34.4049051055.

The spelling of 40725 in words is "forty thousand, seven hundred twenty-five".

Divisors: 1 3 5 9 15 25 45 75 181 225 543 905 1629 2715 4525 8145 13575 40725