1271023617742 has 8 divisors (see below), whose sum is σ = 1908699487632. Its totient is φ = 634790455200.

The previous prime is 1271023617733. The next prime is 1271023617749. The reversal of 1271023617742 is 2477163201721.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271023617749) 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, 360674634 + ... + 360678157.

It is an arithmetic number, because the mean of its divisors is an integer number (238587435954).

Almost surely, 2^{1271023617742} is an apocalyptic number.

1271023617742 is a deficient number, since it is larger than the sum of its proper divisors (637675869890).

1271023617742 is an equidigital number, since it uses as much as digits as its factorization.

1271023617742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721353674.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 1271023617742 in words is "one trillion, two hundred seventy-one billion, twenty-three million, six hundred seventeen thousand, seven hundred forty-two".