4240023 has 4 divisors (see below), whose sum is σ = 5653368. Its totient is φ = 2826680.

The previous prime is 4240007. The next prime is 4240037. The reversal of 4240023 is 3200424.

It is a happy number.

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 4240023 - 2⁴ = 4240007 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 4239984 and 4240011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706668 + ... + 706673.

It is an arithmetic number, because the mean of its divisors is an integer number (1413342).

Almost surely, 2^4240023 is an apocalyptic number.

4240023 is a deficient number, since it is larger than the sum of its proper divisors (1413345).

4240023 is a wasteful number, since it uses less digits than its factorization.

4240023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413344.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 4240023 is about 2059.1316130835. The cubic root of 4240023 is about 161.8537393503.

Adding to 4240023 its reverse (3200424), we get a palindrome (7440447).

The spelling of 4240023 in words is "four million, two hundred forty thousand, twenty-three".