11971604 has 12 divisors (see below), whose sum is σ = 22182804. Its totient is φ = 5633664.

The previous prime is 11971567. The next prime is 11971607. The reversal of 11971604 is 40617911.

It can be written as a sum of positive squares in 2 ways, for example, as 9314704 + 2656900 = 3052^2 + 1630^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971607) 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 3 ways as a sum of consecutive naturals, for example, 87959 + ... + 88094.

It is an arithmetic number, because the mean of its divisors is an integer number (1848567).

Almost surely, 2^11971604 is an apocalyptic number.

It is an amenable number.

11971604 is a deficient number, since it is larger than the sum of its proper divisors (10211200).

11971604 is a wasteful number, since it uses less digits than its factorization.

11971604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176074 (or 176072 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 11971604 is about 3460.0005780346. Note that the first 3 decimals coincide. The cubic root of 11971604 is about 228.7621208504.

The spelling of 11971604 in words is "eleven million, nine hundred seventy-one thousand, six hundred four".