721254256141 has 2 divisors, whose sum is σ = 721254256142. Its totient is φ = 721254256140.

The previous prime is 721254256111. The next prime is 721254256207. The reversal of 721254256141 is 141652452127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667768443241 + 53485812900 = 817171^2 + 231270^2 .

It is an emirp because it is prime and its reverse (141652452127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 721254256141 - 2⁵ = 721254256109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 721254256094 and 721254256103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721254256111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360627128070 + 360627128071.

It is an arithmetic number, because the mean of its divisors is an integer number (360627128071).

Almost surely, 2^721254256141 is an apocalyptic number.

It is an amenable number.

721254256141 is a deficient number, since it is larger than the sum of its proper divisors (1).

721254256141 is an equidigital number, since it uses as much as digits as its factorization.

721254256141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 40.

The spelling of 721254256141 in words is "seven hundred twenty-one billion, two hundred fifty-four million, two hundred fifty-six thousand, one hundred forty-one".