1242320443 has 16 divisors (see below), whose sum is σ = 1578336256. Its totient is φ = 951225120.

The previous prime is 1242320411. The next prime is 1242320447. The reversal of 1242320443 is 3440232421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1242320443 - 2⁵ = 1242320411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242320447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217371 + ... + 223012.

It is an arithmetic number, because the mean of its divisors is an integer number (98646016).

Almost surely, 2^1242320443 is an apocalyptic number.

1242320443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1242320443 is a deficient number, since it is larger than the sum of its proper divisors (336015813).

1242320443 is a wasteful number, since it uses less digits than its factorization.

1242320443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440434.

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

The square root of 1242320443 is about 35246.5664001474. The cubic root of 1242320443 is about 1075.0067980100.

Adding to 1242320443 its reverse (3440232421), we get a palindrome (4682552864).

The spelling of 1242320443 in words is "one billion, two hundred forty-two million, three hundred twenty thousand, four hundred forty-three".