261240052 has 12 divisors (see below), whose sum is σ = 457353540. Its totient is φ = 130567616.

The previous prime is 261240043. The next prime is 261240103. The reversal of 261240052 is 250042162.

261240052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 137452176 + 123787876 = 11724^2 + 11126^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553 + ... + 22864.

It is an arithmetic number, because the mean of its divisors is an integer number (38112795).

Almost surely, 2^261240052 is an apocalyptic number.

It is an amenable number.

261240052 is a deficient number, since it is larger than the sum of its proper divisors (196113488).

261240052 is a wasteful number, since it uses less digits than its factorization.

261240052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26210 (or 26208 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 261240052 is about 16162.9221367920. The cubic root of 261240052 is about 639.2635180506.

The spelling of 261240052 in words is "two hundred sixty-one million, two hundred forty thousand, fifty-two".