1242671971275 has 252 divisors, whose sum is σ = 2704311468792. Its totient is φ = 564527335680.

The previous prime is 1242671971249. The next prime is 1242671971279. The reversal of 1242671971275 is 5721791762421.

It is a happy number.

1242671971275 is a `hidden beast` number, since 1 + 2 + 426 + 7 + 1 + 97 + 127 + 5 = 666.

It is not a de Polignac number, because 1242671971275 - 2¹⁸ = 1242671709131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242671971279) by changing a digit.

It is a polite number, since it can be written in 251 ways as a sum of consecutive naturals, for example, 145558807 + ... + 145567343.

Almost surely, 2^{1242671971275} is an apocalyptic number.

1242671971275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242671971275 is an abundant number, since it is smaller than the sum of its proper divisors (1461639497517).

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

1242671971275 is an equidigital number, since it uses as much as digits as its factorization.

1242671971275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742 (or 8715 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The spelling of 1242671971275 in words is "one trillion, two hundred forty-two billion, six hundred seventy-one million, nine hundred seventy-one thousand, two hundred seventy-five".