261100 has 36 divisors (see below), whose sum is σ = 649264. Its totient is φ = 89280.
The previous prime is 261089. The next prime is 261101. The reversal of 261100 is 1162.
It is a Harshad number since it is a multiple of its sum of digits (10).
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (261101) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514 + ... + 886.
2261100 is an apocalyptic number.
261100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 261100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324632).
261100 is an abundant number, since it is smaller than the sum of its proper divisors (388164).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261100 is a wasteful number, since it uses less digits than its factorization.
261100 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 394 (or 387 counting only the distinct ones).
The product of its (nonzero) digits is 12, while the sum is 10.
The square root of 261100 is about 510.9794516416. The cubic root of 261100 is about 63.9149260254.
Adding to 261100 its reverse (1162), we get a palindrome (262262).
It can be divided in two parts, 261 and 100, that added together give a square (361 = 192).
The spelling of 261100 in words is "two hundred sixty-one thousand, one hundred".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •