131225 has 12 divisors (see below), whose sum is σ = 169260. Its totient is φ = 100800.

The previous prime is 131221. The next prime is 131231. The reversal of 131225 is 522131.

131225 = T₄₆ + T₄₇ + ... + T₉₅.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 26896 + 104329 = 164^2 + 323^2 .

It is not a de Polignac number, because 131225 - 2² = 131221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 635 + ... + 815.

It is an arithmetic number, because the mean of its divisors is an integer number (14105).

2¹³¹²²⁵ is an apocalyptic number.

It is an amenable number.

131225 is a deficient number, since it is larger than the sum of its proper divisors (38035).

131225 is a wasteful number, since it uses less digits than its factorization.

131225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 215 counting only the distinct ones).

The product of its digits is 60, while the sum is 14.

The square root of 131225 is about 362.2499137336. The cubic root of 131225 is about 50.8165909808.

Adding to 131225 its reverse (522131), we get a palindrome (653356).

The spelling of 131225 in words is "one hundred thirty-one thousand, two hundred twenty-five".