261325 has 6 divisors (see below), whose sum is σ = 324074. Its totient is φ = 209040.

The previous prime is 261323. The next prime is 261329. The reversal of 261325 is 523162.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 77284 + 184041 = 278^2 + 429^2 .

It is not a de Polignac number, because 261325 - 2¹ = 261323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5202 + ... + 5251.

2²⁶¹³²⁵ is an apocalyptic number.

261325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261325 is a deficient number, since it is larger than the sum of its proper divisors (62749).

261325 is a wasteful number, since it uses less digits than its factorization.

261325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10463 (or 10458 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 261325 is about 511.1995696399. The cubic root of 261325 is about 63.9332800781.

Adding to 261325 its reverse (523162), we get a palindrome (784487).

The spelling of 261325 in words is "two hundred sixty-one thousand, three hundred twenty-five".