261378754 has 16 divisors (see below), whose sum is σ = 482545728. Its totient is φ = 103402512.

The previous prime is 261378751. The next prime is 261378823. The reversal of 261378754 is 457873162.

261378754 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261378754.

It is not an unprimeable number, because it can be changed into a prime (261378751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717892 + ... + 718255.

It is an arithmetic number, because the mean of its divisors is an integer number (30159108).

Almost surely, 2^261378754 is an apocalyptic number.

261378754 is a deficient number, since it is larger than the sum of its proper divisors (221166974).

261378754 is a wasteful number, since it uses less digits than its factorization.

261378754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436169.

The product of its digits is 282240, while the sum is 43.

The square root of 261378754 is about 16167.2123138159. The cubic root of 261378754 is about 639.3766342442.

The spelling of 261378754 in words is "two hundred sixty-one million, three hundred seventy-eight thousand, seven hundred fifty-four".