261241610 has 32 divisors (see below), whose sum is σ = 538928640. Its totient is φ = 89315712.

The previous prime is 261241609. The next prime is 261241633. The reversal of 261241610 is 16142162.

261241610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20606 + ... + 30774.

It is an arithmetic number, because the mean of its divisors is an integer number (16841520).

Almost surely, 2^261241610 is an apocalyptic number.

261241610 is an abundant number, since it is smaller than the sum of its proper divisors (277687030).

261241610 is a wasteful number, since it uses less digits than its factorization.

261241610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 261241610 is about 16162.9703334505. The cubic root of 261241610 is about 639.2647888749.

Adding to 261241610 its reverse (16142162), we get a palindrome (277383772).

The spelling of 261241610 in words is "two hundred sixty-one million, two hundred forty-one thousand, six hundred ten".