1273128471742 has 8 divisors (see below), whose sum is σ = 1909940004216. Its totient is φ = 636481803672.

The previous prime is 1273128471701. The next prime is 1273128471757. The reversal of 1273128471742 is 2471748213721.

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

It is a super-2 number, since 2×1273128471742² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41196793 + ... + 41227684.

It is an arithmetic number, because the mean of its divisors is an integer number (238742500527).

Almost surely, 2^{1273128471742} is an apocalyptic number.

1273128471742 is a deficient number, since it is larger than the sum of its proper divisors (636811532474).

1273128471742 is an equidigital number, since it uses as much as digits as its factorization.

1273128471742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82432202.

The product of its digits is 1053696, while the sum is 49.

The spelling of 1273128471742 in words is "one trillion, two hundred seventy-three billion, one hundred twenty-eight million, four hundred seventy-one thousand, seven hundred forty-two".