1242431836 has 24 divisors (see below), whose sum is σ = 2203341840. Its totient is φ = 612955392.

The previous prime is 1242431807. The next prime is 1242431837. The reversal of 1242431836 is 6381342421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242431837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96550 + ... + 108658.

It is an arithmetic number, because the mean of its divisors is an integer number (91805910).

Almost surely, 2^1242431836 is an apocalyptic number.

It is an amenable number.

1242431836 is a deficient number, since it is larger than the sum of its proper divisors (960910004).

1242431836 is a wasteful number, since it uses less digits than its factorization.

1242431836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12453 (or 12451 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 1242431836 is about 35248.1465612023. The cubic root of 1242431836 is about 1075.0389273086.

The spelling of 1242431836 in words is "one billion, two hundred forty-two million, four hundred thirty-one thousand, eight hundred thirty-six".