140121081 has 6 divisors (see below), whose sum is σ = 202397130. Its totient is φ = 93414048.

The previous prime is 140121077. The next prime is 140121131. The reversal of 140121081 is 180121041.

140121081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 101183481 + 38937600 = 10059^2 + 6240^2 .

It is not a de Polignac number, because 140121081 - 2² = 140121077 is a prime.

It is a super-2 number, since 2×140121081² = 39267834681217122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140121071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7784496 + ... + 7784513.

It is an arithmetic number, because the mean of its divisors is an integer number (33732855).

Almost surely, 2^140121081 is an apocalyptic number.

It is an amenable number.

140121081 is a deficient number, since it is larger than the sum of its proper divisors (62276049).

140121081 is a wasteful number, since it uses less digits than its factorization.

140121081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15569015 (or 15569012 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 140121081 is about 11837.2750665007. The cubic root of 140121081 is about 519.3990604744.

The spelling of 140121081 in words is "one hundred forty million, one hundred twenty-one thousand, eighty-one".