1242179728 has 20 divisors (see below), whose sum is σ = 2425099248. Its totient is φ = 616347680.

The previous prime is 1242179723. The next prime is 1242179759. The reversal of 1242179728 is 8279712421.

It is not an unprimeable number, because it can be changed into a prime (1242179723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294226 + ... + 298417.

Almost surely, 2^1242179728 is an apocalyptic number.

It is an amenable number.

1242179728 is a deficient number, since it is larger than the sum of its proper divisors (1182919520).

1242179728 is a wasteful number, since it uses less digits than its factorization.

1242179728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592782 (or 592776 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 1242179728 is about 35244.5701917331. The cubic root of 1242179728 is about 1074.9662085646.

The spelling of 1242179728 in words is "one billion, two hundred forty-two million, one hundred seventy-nine thousand, seven hundred twenty-eight".