1240431233 has 8 divisors (see below), whose sum is σ = 1260946848. Its totient is φ = 1219974624.

The previous prime is 1240431223. The next prime is 1240431259. The reversal of 1240431233 is 3321340421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240431233 - 2¹² = 1240427137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240431199 and 1240431208.

It is not an unprimeable number, because it can be changed into a prime (1240431223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28685 + ... + 57477.

It is an arithmetic number, because the mean of its divisors is an integer number (157618356).

Almost surely, 2^1240431233 is an apocalyptic number.

It is an amenable number.

1240431233 is a deficient number, since it is larger than the sum of its proper divisors (20515615).

1240431233 is an equidigital number, since it uses as much as digits as its factorization.

1240431233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29503.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1240431233 is about 35219.7562881971. The cubic root of 1240431233 is about 1074.4615967693.

Adding to 1240431233 its reverse (3321340421), we get a palindrome (4561771654).

The spelling of 1240431233 in words is "one billion, two hundred forty million, four hundred thirty-one thousand, two hundred thirty-three".