2400043 has 4 divisors (see below), whose sum is σ = 2541240. Its totient is φ = 2258848.

The previous prime is 2400037. The next prime is 2400053. The reversal of 2400043 is 3400042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3400042 = 2 ⋅1700021.

It is a cyclic number.

It is not a de Polignac number, because 2400043 - 2⁹ = 2399531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2399996 and 2400032.

It is not an unprimeable number, because it can be changed into a prime (2400053) 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, 70573 + ... + 70606.

It is an arithmetic number, because the mean of its divisors is an integer number (635310).

2^2400043 is an apocalyptic number.

2400043 is a deficient number, since it is larger than the sum of its proper divisors (141197).

2400043 is a wasteful number, since it uses less digits than its factorization.

2400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141196.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 2400043 is about 1549.2072166111. The cubic root of 2400043 is about 133.8873896121.

Adding to 2400043 its reverse (3400042), we get a palindrome (5800085).

Subtracting 2400043 from its reverse (3400042), we obtain a palindrome (999999).

The spelling of 2400043 in words is "two million, four hundred thousand, forty-three".