261322754 has 64 divisors (see below), whose sum is σ = 504444672. Its totient is φ = 98592000.

The previous prime is 261322729. The next prime is 261322771. The reversal of 261322754 is 457223162.

261322754 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 261322754.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 824204 + ... + 824520.

It is an arithmetic number, because the mean of its divisors is an integer number (7881948).

Almost surely, 2^261322754 is an apocalyptic number.

261322754 is a deficient number, since it is larger than the sum of its proper divisors (243121918).

261322754 is a wasteful number, since it uses less digits than its factorization.

261322754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its digits is 20160, while the sum is 32.

The square root of 261322754 is about 16165.4803207328. The cubic root of 261322754 is about 639.3309691594.

The spelling of 261322754 in words is "two hundred sixty-one million, three hundred twenty-two thousand, seven hundred fifty-four".