261054321 has 16 divisors (see below), whose sum is σ = 380153088. Its totient is φ = 158032400.

The previous prime is 261054289. The next prime is 261054323. The reversal of 261054321 is 123450162.

It is a cyclic number.

It is not a de Polignac number, because 261054321 - 2⁵ = 261054289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261054291 and 261054300.

It is not an unprimeable number, because it can be changed into a prime (261054323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27970 + ... + 36116.

It is an arithmetic number, because the mean of its divisors is an integer number (23759568).

Almost surely, 2^261054321 is an apocalyptic number.

It is an amenable number.

261054321 is a deficient number, since it is larger than the sum of its proper divisors (119098767).

261054321 is a wasteful number, since it uses less digits than its factorization.

261054321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 261054321 is about 16157.1755266816. The cubic root of 261054321 is about 639.1119853890. Note that the first 3 decimals are identical.

The spelling of 261054321 in words is "two hundred sixty-one million, fifty-four thousand, three hundred twenty-one".