140189021 has 8 divisors (see below), whose sum is σ = 169640640. Its totient is φ = 113093568.

The previous prime is 140189017. The next prime is 140189053. The reversal of 140189021 is 120981041.

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

It is not a de Polignac number, because 140189021 - 2² = 140189017 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 (140189221) 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, 588911 + ... + 589148.

It is an arithmetic number, because the mean of its divisors is an integer number (21205080).

Almost surely, 2^140189021 is an apocalyptic number.

It is an amenable number.

140189021 is a deficient number, since it is larger than the sum of its proper divisors (29451619).

140189021 is a wasteful number, since it uses less digits than its factorization.

140189021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178083.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 140189021 is about 11840.1444670240. The cubic root of 140189021 is about 519.4829932896.

The spelling of 140189021 in words is "one hundred forty million, one hundred eighty-nine thousand, twenty-one".