1971103 has 4 divisors (see below), whose sum is σ = 1979208. Its totient is φ = 1963000.

The previous prime is 1971091. The next prime is 1971107. The reversal of 1971103 is 3011791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1971103 - 2¹³ = 1962911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3676 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (494802).

2^1971103 is an apocalyptic number.

1971103 is a deficient number, since it is larger than the sum of its proper divisors (8105).

1971103 is an equidigital number, since it uses as much as digits as its factorization.

1971103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8104.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1971103 is about 1403.9597572580. The cubic root of 1971103 is about 125.3823598815.

Adding to 1971103 its reverse (3011791), we get a palindrome (4982894).

The spelling of 1971103 in words is "one million, nine hundred seventy-one thousand, one hundred three".