240420403 has 4 divisors (see below), whose sum is σ = 250873488. Its totient is φ = 229967320.

The previous prime is 240420391. The next prime is 240420431. The reversal of 240420403 is 304024042.

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 240420403 - 2⁵ = 240420371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240420203) 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, 5226508 + ... + 5226553.

It is an arithmetic number, because the mean of its divisors is an integer number (62718372).

Almost surely, 2^240420403 is an apocalyptic number.

240420403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

240420403 is a deficient number, since it is larger than the sum of its proper divisors (10453085).

240420403 is a wasteful number, since it uses less digits than its factorization.

240420403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10453084.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 240420403 is about 15505.4958966168. The cubic root of 240420403 is about 621.8091478227.

Adding to 240420403 its reverse (304024042), we get a palindrome (544444445).

The spelling of 240420403 in words is "two hundred forty million, four hundred twenty thousand, four hundred three".