1242971179 has 4 divisors (see below), whose sum is σ = 1243116160. Its totient is φ = 1242826200.

The previous prime is 1242971161. The next prime is 1242971209. The reversal of 1242971179 is 9711792421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242971179 - 2¹¹ = 1242969131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242971159) 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, 58764 + ... + 77065.

It is an arithmetic number, because the mean of its divisors is an integer number (310779040).

Almost surely, 2^1242971179 is an apocalyptic number.

1242971179 is a deficient number, since it is larger than the sum of its proper divisors (144981).

1242971179 is an equidigital number, since it uses as much as digits as its factorization.

1242971179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144980.

The product of its digits is 63504, while the sum is 43.

The square root of 1242971179 is about 35255.7963886791. The cubic root of 1242971179 is about 1075.1944639006.

The spelling of 1242971179 in words is "one billion, two hundred forty-two million, nine hundred seventy-one thousand, one hundred seventy-nine".