140997321 has 16 divisors (see below), whose sum is σ = 213331200. Its totient is φ = 91997424.

The previous prime is 140997317. The next prime is 140997341. The reversal of 140997321 is 123799041.

140997321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140997321 - 2² = 140997317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140997341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54286 + ... + 56823.

It is an arithmetic number, because the mean of its divisors is an integer number (13333200).

Almost surely, 2^140997321 is an apocalyptic number.

It is an amenable number.

140997321 is a deficient number, since it is larger than the sum of its proper divisors (72333879).

140997321 is a wasteful number, since it uses less digits than its factorization.

140997321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111165 (or 111159 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 140997321 is about 11874.2292802523. The cubic root of 140997321 is about 520.4794899276.

The spelling of 140997321 in words is "one hundred forty million, nine hundred ninety-seven thousand, three hundred twenty-one".