261361270 has 16 divisors (see below), whose sum is σ = 470934720. Its totient is φ = 104436864.

The previous prime is 261361249. The next prime is 261361277. The reversal of 261361270 is 72163162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261361277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2862 + ... + 23041.

It is an arithmetic number, because the mean of its divisors is an integer number (29433420).

Almost surely, 2^261361270 is an apocalyptic number.

261361270 is a deficient number, since it is larger than the sum of its proper divisors (209573450).

261361270 is a wasteful number, since it uses less digits than its factorization.

261361270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26919.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 261361270 is about 16166.6715807553. The cubic root of 261361270 is about 639.3623776527.

The spelling of 261361270 in words is "two hundred sixty-one million, three hundred sixty-one thousand, two hundred seventy".