261308842 has 8 divisors (see below), whose sum is σ = 409005216. Its totient is φ = 124973772.

The previous prime is 261308833. The next prime is 261308849. The reversal of 261308842 is 248803162.

261308842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 261308798 and 261308807.

It is not an unprimeable number, because it can be changed into a prime (261308849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2840268 + ... + 2840359.

It is an arithmetic number, because the mean of its divisors is an integer number (51125652).

Almost surely, 2^261308842 is an apocalyptic number.

261308842 is a deficient number, since it is larger than the sum of its proper divisors (147696374).

261308842 is a wasteful number, since it uses less digits than its factorization.

261308842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680652.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 261308842 is about 16165.0500153881. The cubic root of 261308842 is about 639.3196236360.

The spelling of 261308842 in words is "two hundred sixty-one million, three hundred eight thousand, eight hundred forty-two".