1271387242 has 8 divisors (see below), whose sum is σ = 2007453600. Its totient is φ = 602236044.

The previous prime is 1271387239. The next prime is 1271387251. The reversal of 1271387242 is 2427831721.

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

It is a super-3 number, since 3×1271387242³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16728742 + ... + 16728817.

It is an arithmetic number, because the mean of its divisors is an integer number (250931700).

Almost surely, 2^1271387242 is an apocalyptic number.

1271387242 is a deficient number, since it is larger than the sum of its proper divisors (736066358).

1271387242 is a wasteful number, since it uses less digits than its factorization.

1271387242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33457580.

The product of its digits is 37632, while the sum is 37.

The square root of 1271387242 is about 35656.5175248509. The cubic root of 1271387242 is about 1083.3262909102.

The spelling of 1271387242 in words is "one billion, two hundred seventy-one million, three hundred eighty-seven thousand, two hundred forty-two".