140978121 has 8 divisors (see below), whose sum is σ = 188703264. Its totient is φ = 93619200.

The previous prime is 140978113. The next prime is 140978141. The reversal of 140978121 is 121879041.

140978121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140978121 - 2³ = 140978113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140978141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90655 + ... + 92196.

It is an arithmetic number, because the mean of its divisors is an integer number (23587908).

Almost surely, 2^140978121 is an apocalyptic number.

It is an amenable number.

140978121 is a deficient number, since it is larger than the sum of its proper divisors (47725143).

140978121 is a wasteful number, since it uses less digits than its factorization.

140978121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183111.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 140978121 is about 11873.4207792026. The cubic root of 140978121 is about 520.4558638053.

The spelling of 140978121 in words is "one hundred forty million, nine hundred seventy-eight thousand, one hundred twenty-one".