140268021 has 8 divisors (see below), whose sum is σ = 191373600. Its totient is φ = 91337232.

The previous prime is 140268019. The next prime is 140268031. The reversal of 140268021 is 120862041.

140268021 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 140268021 - 2¹ = 140268019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140267982 and 140268000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140268001) 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, 543546 + ... + 543803.

It is an arithmetic number, because the mean of its divisors is an integer number (23921700).

Almost surely, 2^140268021 is an apocalyptic number.

It is an amenable number.

140268021 is a deficient number, since it is larger than the sum of its proper divisors (51105579).

140268021 is a wasteful number, since it uses less digits than its factorization.

140268021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087395.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 140268021 is about 11843.4801051042. The cubic root of 140268021 is about 519.5805554946.

The spelling of 140268021 in words is "one hundred forty million, two hundred sixty-eight thousand, twenty-one".