261950 has 36 divisors (see below), whose sum is σ = 544608. Its totient is φ = 93600.

The previous prime is 261917. The next prime is 261959. The reversal of 261950 is 59162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261959) by changing a digit.

261950 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8435 + ... + 8465.

It is an arithmetic number, because the mean of its divisors is an integer number (15128).

2²⁶¹⁹⁵⁰ is an apocalyptic number.

261950 is an abundant number, since it is smaller than the sum of its proper divisors (282658).

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

261950 is a wasteful number, since it uses less digits than its factorization.

261950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 261950 is about 511.8105118108. The cubic root of 261950 is about 63.9842083434.

The spelling of 261950 in words is "two hundred sixty-one thousand, nine hundred fifty".