1240903 has 4 divisors (see below), whose sum is σ = 1247400. Its totient is φ = 1234408.

The previous prime is 1240861. The next prime is 1240931. The reversal of 1240903 is 3090421.

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 1240903 - 2⁹ = 1240391 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 (1240973) 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, 2953 + ... + 3346.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

2^1240903 is an apocalyptic number.

1240903 is a deficient number, since it is larger than the sum of its proper divisors (6497).

1240903 is an equidigital number, since it uses as much as digits as its factorization.

1240903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1240903 is about 1113.9582577458. The cubic root of 1240903 is about 107.4597794371.

The spelling of 1240903 in words is "one million, two hundred forty thousand, nine hundred three".