140421 has 4 divisors (see below), whose sum is σ = 187232. Its totient is φ = 93612.

The previous prime is 140419. The next prime is 140423. The reversal of 140421 is 124041.

140421 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (140419) and next prime (140423).

It is not a de Polignac number, because 140421 - 2¹ = 140419 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140397 and 140406.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140421.

It is not an unprimeable number, because it can be changed into a prime (140423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23401 + ... + 23406.

It is an arithmetic number, because the mean of its divisors is an integer number (46808).

2¹⁴⁰⁴²¹ is an apocalyptic number.

It is an amenable number.

140421 is a deficient number, since it is larger than the sum of its proper divisors (46811).

140421 is an equidigital number, since it uses as much as digits as its factorization.

140421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46810.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 140421 is about 374.7279012831. The cubic root of 140421 is about 51.9769375048.

Adding to 140421 its reverse (124041), we get a palindrome (264462).

It can be divided in two parts, 140 and 421, that added together give a triangular number (561 = T₃₃).

The spelling of 140421 in words is "one hundred forty thousand, four hundred twenty-one", and thus it is an iban number.