71274236921 has 8 divisors (see below), whose sum is σ = 71546569224. Its totient is φ = 71002189440.

The previous prime is 71274236909. The next prime is 71274236953. The reversal of 71274236921 is 12963247217.

It can be written as a sum of positive squares in 4 ways, for example, as 377719225 + 70896517696 = 19435^2 + 266264^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 71274236921 - 2¹⁰ = 71274235897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71274236321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437135 + ... + 577611.

It is an arithmetic number, because the mean of its divisors is an integer number (8943321153).

Almost surely, 2^71274236921 is an apocalyptic number.

It is an amenable number.

71274236921 is a deficient number, since it is larger than the sum of its proper divisors (272332303).

71274236921 is a wasteful number, since it uses less digits than its factorization.

71274236921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142411.

The product of its digits is 254016, while the sum is 44.

The spelling of 71274236921 in words is "seventy-one billion, two hundred seventy-four million, two hundred thirty-six thousand, nine hundred twenty-one".