261226642 has 8 divisors (see below), whose sum is σ = 391933296. Its totient is φ = 130582212.

The previous prime is 261226639. The next prime is 261226657. The reversal of 261226642 is 246622162.

261226642 is digitally balanced in base 3, 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3048 + ... + 23059.

It is an arithmetic number, because the mean of its divisors is an integer number (48991662).

Almost surely, 2^261226642 is an apocalyptic number.

261226642 is a deficient number, since it is larger than the sum of its proper divisors (130706654).

261226642 is a wasteful number, since it uses less digits than its factorization.

261226642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31112.

The product of its digits is 13824, while the sum is 31.

The square root of 261226642 is about 16162.5072931151. The cubic root of 261226642 is about 639.2525796176.

The spelling of 261226642 in words is "two hundred sixty-one million, two hundred twenty-six thousand, six hundred forty-two".