2103491 has 4 divisors (see below), whose sum is σ = 2265312. Its totient is φ = 1941672.

The previous prime is 2103473. The next prime is 2103503. The reversal of 2103491 is 1943012.

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 2103491 - 2¹⁰ = 2102467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103791) 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, 80891 + ... + 80916.

It is an arithmetic number, because the mean of its divisors is an integer number (566328).

2^2103491 is an apocalyptic number.

2103491 is a deficient number, since it is larger than the sum of its proper divisors (161821).

2103491 is a wasteful number, since it uses less digits than its factorization.

2103491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161820.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2103491 is about 1450.3416838800. The cubic root of 2103491 is about 128.1288375610.

The spelling of 2103491 in words is "two million, one hundred three thousand, four hundred ninety-one".