261250 has 40 divisors (see below), whose sum is σ = 562320. Its totient is φ = 90000.

The previous prime is 261241. The next prime is 261251. The reversal of 261250 is 52162.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (261251) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13741 + ... + 13759.

It is an arithmetic number, because the mean of its divisors is an integer number (14058).

2²⁶¹²⁵⁰ is an apocalyptic number.

261250 is an abundant number, since it is smaller than the sum of its proper divisors (301070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261250 is a wasteful number, since it uses less digits than its factorization.

261250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 261250 is about 511.1262075065. The cubic root of 261250 is about 63.9271632315.

It can be divided in two parts, 2612 and 50, that added together give a palindrome (2662).

The spelling of 261250 in words is "two hundred sixty-one thousand, two hundred fifty".