1240421433 has 4 divisors (see below), whose sum is σ = 1653895248. Its totient is φ = 826947620.

The previous prime is 1240421419. The next prime is 1240421447. The reversal of 1240421433 is 3341240421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1240421419) and next prime (1240421447).

It is a cyclic number.

It is not a de Polignac number, because 1240421433 - 2⁹ = 1240420921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240421933) 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 3 ways as a sum of consecutive naturals, for example, 206736903 + ... + 206736908.

It is an arithmetic number, because the mean of its divisors is an integer number (413473812).

Almost surely, 2^1240421433 is an apocalyptic number.

It is an amenable number.

1240421433 is a deficient number, since it is larger than the sum of its proper divisors (413473815).

1240421433 is an equidigital number, since it uses as much as digits as its factorization.

1240421433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413473814.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1240421433 is about 35219.6171614627. The cubic root of 1240421433 is about 1074.4587671750.

Adding to 1240421433 its reverse (3341240421), we get a palindrome (4581661854).

The spelling of 1240421433 in words is "one billion, two hundred forty million, four hundred twenty-one thousand, four hundred thirty-three".