1235234939871 has 4 divisors (see below), whose sum is σ = 1646979919832. Its totient is φ = 823489959912.

The previous prime is 1235234939867. The next prime is 1235234939881. The reversal of 1235234939871 is 1789394325321.

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

It is not a de Polignac number, because 1235234939871 - 2² = 1235234939867 is a prime.

It is a super-2 number, since 2×1235234939871² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235234939881) 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, 205872489976 + ... + 205872489981.

It is an arithmetic number, because the mean of its divisors is an integer number (411744979958).

Almost surely, 2^{1235234939871} is an apocalyptic number.

1235234939871 is a deficient number, since it is larger than the sum of its proper divisors (411744979961).

1235234939871 is an equidigital number, since it uses as much as digits as its factorization.

1235234939871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411744979960.

The product of its digits is 9797760, while the sum is 57.

The spelling of 1235234939871 in words is "one trillion, two hundred thirty-five billion, two hundred thirty-four million, nine hundred thirty-nine thousand, eight hundred seventy-one".