1271986242 has 8 divisors (see below), whose sum is σ = 2543972496. Its totient is φ = 423995412.

The previous prime is 1271986207. The next prime is 1271986249. The reversal of 1271986242 is 2426891721.

It is a sphenic number, since it is the product of 3 distinct primes.

1271986242 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1271986194 and 1271986203.

It is not an unprimeable number, because it can be changed into a prime (1271986249) 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, 105998848 + ... + 105998859.

It is an arithmetic number, because the mean of its divisors is an integer number (317996562).

Almost surely, 2^1271986242 is an apocalyptic number.

1271986242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271986242 is a wasteful number, since it uses less digits than its factorization.

1271986242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211997712.

The product of its digits is 96768, while the sum is 42.

The square root of 1271986242 is about 35664.9161221501. The cubic root of 1271986242 is about 1083.4963965880.

The spelling of 1271986242 in words is "one billion, two hundred seventy-one million, nine hundred eighty-six thousand, two hundred forty-two".