140341021 has 4 divisors (see below), whose sum is σ = 140765344. Its totient is φ = 139916700.

The previous prime is 140340961. The next prime is 140341031. The reversal of 140341021 is 120143041.

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 a cyclic number.

It is not a de Polignac number, because 140341021 - 2⁹ = 140340509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140340986 and 140341004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140341031) 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, 211665 + ... + 212326.

It is an arithmetic number, because the mean of its divisors is an integer number (35191336).

Almost surely, 2^140341021 is an apocalyptic number.

It is an amenable number.

140341021 is a deficient number, since it is larger than the sum of its proper divisors (424323).

140341021 is an equidigital number, since it uses as much as digits as its factorization.

140341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424322.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 140341021 is about 11846.5615686578. The cubic root of 140341021 is about 519.6706753530.

Adding to 140341021 its reverse (120143041), we get a palindrome (260484062).

It can be divided in two parts, 1403 and 41021, that added together give a palindrome (42424).

The spelling of 140341021 in words is "one hundred forty million, three hundred forty-one thousand, twenty-one".