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7625 = 5361
BaseRepresentation
bin1110111001001
3101110102
41313021
5221000
655145
731142
oct16711
911412
107625
115802
1244b5
133617
142ac9
1523d5
hex1dc9

7625 has 8 divisors (see below), whose sum is σ = 9672. Its totient is φ = 6000.

The previous prime is 7621. The next prime is 7639. The reversal of 7625 is 5267.

It can be written as a sum of positive squares in 4 ways, for example, as 1849 + 5776 = 43^2 + 76^2 .

It is not a de Polignac number, because 7625 - 22 = 7621 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 7597 and 7606.

It is not an unprimeable number, because it can be changed into a prime (7621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95 + ... + 155.

It is an arithmetic number, because the mean of its divisors is an integer number (1209).

27625 is an apocalyptic number.

It is an amenable number.

7625 is a deficient number, since it is larger than the sum of its proper divisors (2047).

7625 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (7626) it forms an eRAP, since the sums of their prime factors are consecutive (76 and 77).

7625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 66 counting only the distinct ones).

The product of its digits is 420, while the sum is 20.

The square root of 7625 is about 87.3212459829. The cubic root of 7625 is about 19.6824859155.

The spelling of 7625 in words is "seven thousand, six hundred twenty-five".

Divisors: 1 5 25 61 125 305 1525 7625