261241652 has 24 divisors (see below), whose sum is σ = 553218624. Its totient is φ = 105374592.

The previous prime is 261241639. The next prime is 261241663. The reversal of 261241652 is 256142162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273938 + ... + 274889.

It is an arithmetic number, because the mean of its divisors is an integer number (23050776).

Almost surely, 2^261241652 is an apocalyptic number.

It is an amenable number.

261241652 is an abundant number, since it is smaller than the sum of its proper divisors (291976972).

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

261241652 is a wasteful number, since it uses less digits than its factorization.

261241652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548855 (or 548853 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 261241652 is about 16162.9716327166. The cubic root of 261241652 is about 639.2648231332.

The spelling of 261241652 in words is "two hundred sixty-one million, two hundred forty-one thousand, six hundred fifty-two".