11641905 has 48 divisors (see below), whose sum is σ = 22800960. Its totient is φ = 5443200.

The previous prime is 11641901. The next prime is 11641919. The reversal of 11641905 is 50914611.

11641905 is a `hidden beast` number, since 11 + 641 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 11641905 - 2² = 11641901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11641901) 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, 13950 + ... + 14760.

It is an arithmetic number, because the mean of its divisors is an integer number (475020).

Almost surely, 2^11641905 is an apocalyptic number.

11641905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11641905 is a deficient number, since it is larger than the sum of its proper divisors (11159055).

11641905 is a wasteful number, since it uses less digits than its factorization.

11641905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 11641905 is about 3412.0235931189. The cubic root of 11641905 is about 226.6424991054.

The spelling of 11641905 in words is "eleven million, six hundred forty-one thousand, nine hundred five".