727144121 has 4 divisors (see below), whose sum is σ = 793248144. Its totient is φ = 661040100.

The previous prime is 727144109. The next prime is 727144129. The reversal of 727144121 is 121441727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 727144121 - 2¹⁸ = 726881977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727144129) 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, 33051995 + ... + 33052016.

It is an arithmetic number, because the mean of its divisors is an integer number (198312036).

Almost surely, 2^727144121 is an apocalyptic number.

It is an amenable number.

727144121 is a deficient number, since it is larger than the sum of its proper divisors (66104023).

727144121 is a wasteful number, since it uses less digits than its factorization.

727144121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66104022.

The product of its digits is 3136, while the sum is 29.

The square root of 727144121 is about 26965.6099689957. The cubic root of 727144121 is about 899.2356147645.

Adding to 727144121 its reverse (121441727), we get a palindrome (848585848).

The spelling of 727144121 in words is "seven hundred twenty-seven million, one hundred forty-four thousand, one hundred twenty-one".