11905506 has 12 divisors (see below), whose sum is σ = 25795302. Its totient is φ = 3968496.

The previous prime is 11905501. The next prime is 11905529. The reversal of 11905506 is 60550911.

It can be written as a sum of positive squares in only one way, i.e., 11840481 + 65025 = 3441^2 + 255^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11905506.

It is not an unprimeable number, because it can be changed into a prime (11905501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330691 + ... + 330726.

Almost surely, 2^11905506 is an apocalyptic number.

11905506 is an abundant number, since it is smaller than the sum of its proper divisors (13889796).

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

11905506 is a wasteful number, since it uses less digits than its factorization.

11905506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661425 (or 661422 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The square root of 11905506 is about 3450.4356246712. The cubic root of 11905506 is about 228.3403273945.

The spelling of 11905506 in words is "eleven million, nine hundred five thousand, five hundred six".