261237 has 12 divisors (see below), whose sum is σ = 366464. Its totient is φ = 165360.

The previous prime is 261229. The next prime is 261241. The reversal of 261237 is 732162.

It is a happy number.

It is not a de Polignac number, because 261237 - 2³ = 261229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 261237.

It is not an unprimeable number, because it can be changed into a prime (261337) 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 11 ways as a sum of consecutive naturals, for example, 4903 + ... + 4955.

2²⁶¹²³⁷ is an apocalyptic number.

It is an amenable number.

261237 is a deficient number, since it is larger than the sum of its proper divisors (105227).

261237 is an equidigital number, since it uses as much as digits as its factorization.

261237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 87 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 261237 is about 511.1134903326. The cubic root of 261237 is about 63.9261028591.

Adding to 261237 its reverse (732162), we get a palindrome (993399).

The spelling of 261237 in words is "two hundred sixty-one thousand, two hundred thirty-seven".