1242403443 has 24 divisors (see below), whose sum is σ = 1918294560. Its totient is φ = 772928640.

The previous prime is 1242403439. The next prime is 1242403453. The reversal of 1242403443 is 3443042421.

It is a happy number.

It is not a de Polignac number, because 1242403443 - 2² = 1242403439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242403423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64708 + ... + 81681.

It is an arithmetic number, because the mean of its divisors is an integer number (79928940).

Almost surely, 2^1242403443 is an apocalyptic number.

1242403443 is a deficient number, since it is larger than the sum of its proper divisors (675891117).

1242403443 is a wasteful number, since it uses less digits than its factorization.

1242403443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146459 (or 146456 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 1242403443 is about 35247.7438001356. The cubic root of 1242403443 is about 1075.0307380430.

Adding to 1242403443 its reverse (3443042421), we get a palindrome (4685445864).

The spelling of 1242403443 in words is "one billion, two hundred forty-two million, four hundred three thousand, four hundred forty-three".