261246700 has 72 divisors (see below), whose sum is σ = 666051120. Its totient is φ = 87686400.

The previous prime is 261246691. The next prime is 261246707. The reversal of 261246700 is 7642162.

It is not an unprimeable number, because it can be changed into a prime (261246707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5166 + ... + 23434.

It is an arithmetic number, because the mean of its divisors is an integer number (9250710).

Almost surely, 2^261246700 is an apocalyptic number.

261246700 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 261246700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333025560).

261246700 is an abundant number, since it is smaller than the sum of its proper divisors (404804420).

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

261246700 is a wasteful number, since it uses less digits than its factorization.

261246700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18307 (or 18300 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 261246700 is about 16163.1277913651. The cubic root of 261246700 is about 639.2689406339.

Adding to 261246700 its reverse (7642162), we get a palindrome (268888862).

The spelling of 261246700 in words is "two hundred sixty-one million, two hundred forty-six thousand, seven hundred".