140210725605721 has 9 divisors (see below), whose sum is σ = 148943787403261. Its totient is φ = 131962846407232.

The previous prime is 140210725605631. The next prime is 140210725605739. The reversal of 140210725605721 is 127506527012041.

The square root of 140210725605721 is 11841061.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 20934184501321 + 119276541104400 = 4575389^2 + 10921380^2 .

It is not a de Polignac number, because 140210725605721 - 2¹⁷ = 140210725474649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140210725605121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 200949771 + ... + 201646303.

Almost surely, 2^{140210725605721} is an apocalyptic number.

140210725605721 is the 11841061-st square number.

140210725605721 is the 5920531-st centered octagonal number.

It is an amenable number.

140210725605721 is a deficient number, since it is larger than the sum of its proper divisors (8733061797540).

140210725605721 is an frugal number, since it uses more digits than its factorization.

140210725605721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393100 (or 696550 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 140210725605721 in words is "one hundred forty trillion, two hundred ten billion, seven hundred twenty-five million, six hundred five thousand, seven hundred twenty-one".