261442606 has 8 divisors (see below), whose sum is σ = 392232744. Its totient is φ = 130698360.

The previous prime is 261442591. The next prime is 261442637. The reversal of 261442606 is 606244162.

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

It is a congruent number.

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, 14856 + ... + 27268.

It is an arithmetic number, because the mean of its divisors is an integer number (49029093).

Almost surely, 2^261442606 is an apocalyptic number.

261442606 is a deficient number, since it is larger than the sum of its proper divisors (130790138).

261442606 is a wasteful number, since it uses less digits than its factorization.

261442606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22946.

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

The square root of 261442606 is about 16169.1869307025. The cubic root of 261442606 is about 639.4286942686.

Adding to 261442606 its reverse (606244162), we get a palindrome (867686768).

The spelling of 261442606 in words is "two hundred sixty-one million, four hundred forty-two thousand, six hundred six".