140143421 has 8 divisors (see below), whose sum is σ = 155037888. Its totient is φ = 125608000.

The previous prime is 140143403. The next prime is 140143463. The reversal of 140143421 is 124341041.

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

It is a cyclic number.

It is not a de Polignac number, because 140143421 - 2¹⁸ = 139881277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140143393 and 140143402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140133421) 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, 88940 + ... + 90501.

It is an arithmetic number, because the mean of its divisors is an integer number (19379736).

Almost surely, 2^140143421 is an apocalyptic number.

140143421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140143421 is a deficient number, since it is larger than the sum of its proper divisors (14894467).

140143421 is a wasteful number, since it uses less digits than its factorization.

140143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179523.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 140143421 is about 11838.2186582273. The cubic root of 140143421 is about 519.4266622179.

Adding to 140143421 its reverse (124341041), we get a palindrome (264484462).

The spelling of 140143421 in words is "one hundred forty million, one hundred forty-three thousand, four hundred twenty-one".