1242930655171 has 4 divisors (see below), whose sum is σ = 1243205705200. Its totient is φ = 1242655605144.

The previous prime is 1242930655151. The next prime is 1242930655217. The reversal of 1242930655171 is 1715560392421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242930655171 - 2²³ = 1242922266563 is a prime.

It is a super-2 number, since 2×1242930655171² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242930655121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137518236 + ... + 137527273.

It is an arithmetic number, because the mean of its divisors is an integer number (310801426300).

Almost surely, 2^{1242930655171} is an apocalyptic number.

1242930655171 is a deficient number, since it is larger than the sum of its proper divisors (275050029).

1242930655171 is an equidigital number, since it uses as much as digits as its factorization.

1242930655171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275050028.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 1242930655171 in words is "one trillion, two hundred forty-two billion, nine hundred thirty million, six hundred fifty-five thousand, one hundred seventy-one".