1971204 has 12 divisors (see below), whose sum is σ = 4599504. Its totient is φ = 657064.

The previous prime is 1971199. The next prime is 1971209. The reversal of 1971204 is 4021791.

It is an interprime number because it is at equal distance from previous prime (1971199) and next prime (1971209).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1971209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82122 + ... + 82145.

It is an arithmetic number, because the mean of its divisors is an integer number (383292).

2^1971204 is an apocalyptic number.

It is an amenable number.

1971204 is an abundant number, since it is smaller than the sum of its proper divisors (2628300).

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

1971204 is a wasteful number, since it uses less digits than its factorization.

1971204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164274 (or 164272 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1971204 is about 1403.9957264892. The cubic root of 1971204 is about 125.3845013901.

Adding to 1971204 its reverse (4021791), we get a palindrome (5992995).

The spelling of 1971204 in words is "one million, nine hundred seventy-one thousand, two hundred four".