140663021 has 16 divisors (see below), whose sum is σ = 149040000. Its totient is φ = 132557376.

The previous prime is 140662997. The next prime is 140663053. The reversal of 140663021 is 120366041.

It is a happy number.

It is not a de Polignac number, because 140663021 - 2¹⁴ = 140646637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140663221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391640 + ... + 391998.

It is an arithmetic number, because the mean of its divisors is an integer number (9315000).

Almost surely, 2^140663021 is an apocalyptic number.

It is an amenable number.

140663021 is a deficient number, since it is larger than the sum of its proper divisors (8376979).

140663021 is a wasteful number, since it uses less digits than its factorization.

140663021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 140663021 is about 11860.1442234064. The cubic root of 140663021 is about 520.0678178314.

The spelling of 140663021 in words is "one hundred forty million, six hundred sixty-three thousand, twenty-one".