261305124 has 12 divisors (see below), whose sum is σ = 609711984. Its totient is φ = 87101704.

The previous prime is 261305123. The next prime is 261305141. The reversal of 261305124 is 421503162.

261305124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 261305094 and 261305103.

It is not an unprimeable number, because it can be changed into a prime (261305123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10887702 + ... + 10887725.

It is an arithmetic number, because the mean of its divisors is an integer number (50809332).

Almost surely, 2^261305124 is an apocalyptic number.

It is an amenable number.

261305124 is an abundant number, since it is smaller than the sum of its proper divisors (348406860).

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

261305124 is a wasteful number, since it uses less digits than its factorization.

261305124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21775434 (or 21775432 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 261305124 is about 16164.9350137883. The cubic root of 261305124 is about 639.3165914620.

Adding to 261305124 its reverse (421503162), we get a palindrome (682808286).

The spelling of 261305124 in words is "two hundred sixty-one million, three hundred five thousand, one hundred twenty-four".