140233421 has 4 divisors (see below), whose sum is σ = 140576700. Its totient is φ = 139890144.

The previous prime is 140233409. The next prime is 140233427. The reversal of 140233421 is 124332041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99720196 + 40513225 = 9986^2 + 6365^2 .

It is a cyclic number.

It is not a de Polignac number, because 140233421 - 2¹⁸ = 139971277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140233393 and 140233402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140233427) 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, 171026 + ... + 171843.

It is an arithmetic number, because the mean of its divisors is an integer number (35144175).

Almost surely, 2^140233421 is an apocalyptic number.

It is an amenable number.

140233421 is a deficient number, since it is larger than the sum of its proper divisors (343279).

140233421 is an equidigital number, since it uses as much as digits as its factorization.

140233421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343278.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 140233421 is about 11842.0192957114. The cubic root of 140233421 is about 519.5378302285.

Adding to 140233421 its reverse (124332041), we get a palindrome (264565462).

The spelling of 140233421 in words is "one hundred forty million, two hundred thirty-three thousand, four hundred twenty-one".