11864905 has 8 divisors (see below), whose sum is σ = 15333192. Its totient is φ = 8761728.

The previous prime is 11864903. The next prime is 11864981. The reversal of 11864905 is 50946811.

It can be written as a sum of positive squares in 4 ways, for example, as 413449 + 11451456 = 643^2 + 3384^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11864905 - 2¹ = 11864903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11864903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91204 + ... + 91333.

It is an arithmetic number, because the mean of its divisors is an integer number (1916649).

Almost surely, 2^11864905 is an apocalyptic number.

It is an amenable number.

11864905 is a deficient number, since it is larger than the sum of its proper divisors (3468287).

11864905 is a wasteful number, since it uses less digits than its factorization.

11864905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182555.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 11864905 is about 3444.5471400461. The cubic root of 11864905 is about 228.0804643154.

It can be divided in two parts, 11864 and 905, that added together give a square (12769 = 113²).

The spelling of 11864905 in words is "eleven million, eight hundred sixty-four thousand, nine hundred five".