1240432243 has 2 divisors, whose sum is σ = 1240432244. Its totient is φ = 1240432242.

The previous prime is 1240432229. The next prime is 1240432337. The reversal of 1240432243 is 3422340421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240432243 - 2¹³ = 1240424051 is a prime.

It is a super-2 number, since 2×1240432243² = 3077344298948022098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1240432213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620216121 + 620216122.

It is an arithmetic number, because the mean of its divisors is an integer number (620216122).

Almost surely, 2^1240432243 is an apocalyptic number.

1240432243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240432243 is an equidigital number, since it uses as much as digits as its factorization.

1240432243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1240432243 is about 35219.7706267375. The cubic root of 1240432243 is about 1074.4618883899.

Adding to 1240432243 its reverse (3422340421), we get a palindrome (4662772664).

The spelling of 1240432243 in words is "one billion, two hundred forty million, four hundred thirty-two thousand, two hundred forty-three".