1240424043 has 4 divisors (see below), whose sum is σ = 1653898728. Its totient is φ = 826949360.

The previous prime is 1240424041. The next prime is 1240424051. The reversal of 1240424043 is 3404240421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3404240421 = 3 ⋅1134746807.

It is a cyclic number.

It is not a de Polignac number, because 1240424043 - 2¹ = 1240424041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240424041) 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, 206737338 + ... + 206737343.

It is an arithmetic number, because the mean of its divisors is an integer number (413474682).

Almost surely, 2^1240424043 is an apocalyptic number.

1240424043 is a deficient number, since it is larger than the sum of its proper divisors (413474685).

1240424043 is an equidigital number, since it uses as much as digits as its factorization.

1240424043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413474684.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 1240424043 is about 35219.6542146569. The cubic root of 1240424043 is about 1074.4595207725.

Adding to 1240424043 its reverse (3404240421), we get a palindrome (4644664464).

The spelling of 1240424043 in words is "one billion, two hundred forty million, four hundred twenty-four thousand, forty-three".