1261332606 has 8 divisors (see below), whose sum is σ = 2522665224. Its totient is φ = 420444200.

The previous prime is 1261332601. The next prime is 1261332607. The reversal of 1261332606 is 6062331621.

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

1261332606 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261332601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105111045 + ... + 105111056.

It is an arithmetic number, because the mean of its divisors is an integer number (315333153).

Almost surely, 2^1261332606 is an apocalyptic number.

1261332606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261332606 is a wasteful number, since it uses less digits than its factorization.

1261332606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210222106.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1261332606 is about 35515.2446985798. The cubic root of 1261332606 is about 1080.4629376807.

The spelling of 1261332606 in words is "one billion, two hundred sixty-one million, three hundred thirty-two thousand, six hundred six".