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70225 = 52532
BaseRepresentation
bin10001001001010001
310120022221
4101021101
54221400
61301041
7411511
oct211121
9116287
1070225
1148841
1234781
1325c6c
141b841
1515c1a
hex11251

70225 has 9 divisors (see below), whose sum is σ = 88753. Its totient is φ = 55120.

The previous prime is 70223. The next prime is 70229. The reversal of 70225 is 52207.

Multipling 70225 by its sum of digits (16), we get a square (1123600 = 10602).

It can be divided in two parts, 702 and 25, that added together give a palindrome (727).

70225 = T26 + T27 + ... + T75.

It is a happy number.

The square root of 70225 is 265.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 529 + 69696 = 23^2 + 264^2 .

It is not a de Polignac number, because 70225 - 21 = 70223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70199 and 70208.

It is not an unprimeable number, because it can be changed into a prime (70223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1299 + ... + 1351.

70225 is a Friedman number, since it can be written as (270-5)^2, using all its digits and the basic arithmetic operations.

270225 is an apocalyptic number.

70225 is the 265-th square number.

70225 is the 133-rd centered octagonal number.

It is an amenable number.

70225 is a deficient number, since it is larger than the sum of its proper divisors (18528).

70225 is an equidigital number, since it uses as much as digits as its factorization.

70225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 16.

The cubic root of 70225 is about 41.2569623999.

The spelling of 70225 in words is "seventy thousand, two hundred twenty-five".

Divisors: 1 5 25 53 265 1325 2809 14045 70225