11992905 has 48 divisors (see below), whose sum is σ = 22458384. Its totient is φ = 5898240.

The previous prime is 11992901. The next prime is 11992909. The reversal of 11992905 is 50929911.

11992905 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11992901) and next prime (11992909).

It can be written as a sum of positive squares in 8 ways, for example, as 131769 + 11861136 = 363^2 + 3444^2 .

It is not a de Polignac number, because 11992905 - 2² = 11992901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11992905.

It is not an unprimeable number, because it can be changed into a prime (11992901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46537 + ... + 46793.

It is an arithmetic number, because the mean of its divisors is an integer number (467883).

Almost surely, 2^11992905 is an apocalyptic number.

11992905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11992905 is a deficient number, since it is larger than the sum of its proper divisors (10465479).

11992905 is a wasteful number, since it uses less digits than its factorization.

11992905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 11992905 is about 3463.0773886819. The cubic root of 11992905 is about 228.8977187955.

The spelling of 11992905 in words is "eleven million, nine hundred ninety-two thousand, nine hundred five".