2403945 has 16 divisors (see below), whose sum is σ = 4273920. Its totient is φ = 1282032.

The previous prime is 2403941. The next prime is 2403959. The reversal of 2403945 is 5493042.

2403945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2403945 - 2² = 2403941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2403941) 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 15 ways as a sum of consecutive naturals, for example, 8769 + ... + 9038.

It is an arithmetic number, because the mean of its divisors is an integer number (267120).

2^2403945 is an apocalyptic number.

It is an amenable number.

2403945 is a deficient number, since it is larger than the sum of its proper divisors (1869975).

2403945 is a wasteful number, since it uses less digits than its factorization.

2403945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17821 (or 17815 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2403945 is about 1550.4660589642. The cubic root of 2403945 is about 133.9599085528.

Adding to 2403945 its reverse (5493042), we get a palindrome (7896987).

The spelling of 2403945 in words is "two million, four hundred three thousand, nine hundred forty-five".