140621 has 8 divisors (see below), whose sum is σ = 157080. Its totient is φ = 124992.

The previous prime is 140617. The next prime is 140627. The reversal of 140621 is 126041.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 133225 = 86^2 + 365^2 .

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 140621 - 2² = 140617 is a prime.

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 = 140596 and 140605.

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 140621.

It is not an unprimeable number, because it can be changed into a prime (140627) 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, 191 + ... + 563.

It is an arithmetic number, because the mean of its divisors is an integer number (19635).

2¹⁴⁰⁶²¹ is an apocalyptic number.

It is an amenable number.

140621 is a deficient number, since it is larger than the sum of its proper divisors (16459).

140621 is a wasteful number, since it uses less digits than its factorization.

140621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 140621 is about 374.9946666287. The cubic root of 140621 is about 52.0016025147.

Adding to 140621 its reverse (126041), we get a palindrome (266662).

The spelling of 140621 in words is "one hundred forty thousand, six hundred twenty-one".