23405243 has 12 divisors (see below), whose sum is σ = 25124880. Its totient is φ = 21796992.

The previous prime is 23405203. The next prime is 23405257. The reversal of 23405243 is 34250432.

It is a de Polignac number, because none of the positive numbers 2^k-23405243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23405203) 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 11 ways as a sum of consecutive naturals, for example, 31130 + ... + 31872.

It is an arithmetic number, because the mean of its divisors is an integer number (2093740).

Almost surely, 2^23405243 is an apocalyptic number.

23405243 is a deficient number, since it is larger than the sum of its proper divisors (1719637).

23405243 is a wasteful number, since it uses less digits than its factorization.

23405243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 23405243 is about 4837.8965470543. The cubic root of 23405243 is about 286.0472113041.

Adding to 23405243 its reverse (34250432), we get a palindrome (57655675).

The spelling of 23405243 in words is "twenty-three million, four hundred five thousand, two hundred forty-three".