140344521 has 8 divisors (see below), whose sum is σ = 187930080. Its totient is φ = 93160992.

The previous prime is 140344499. The next prime is 140344549. The reversal of 140344521 is 125443041.

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

It is not a de Polignac number, because 140344521 - 2¹⁷ = 140213449 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140344491 and 140344500.

It is not an unprimeable number, because it can be changed into a prime (140344121) 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, 99691 + ... + 101088.

It is an arithmetic number, because the mean of its divisors is an integer number (23491260).

Almost surely, 2^140344521 is an apocalyptic number.

It is an amenable number.

140344521 is a deficient number, since it is larger than the sum of its proper divisors (47585559).

140344521 is a wasteful number, since it uses less digits than its factorization.

140344521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201015.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 140344521 is about 11846.7092899252. The cubic root of 140344521 is about 519.6749953829.

Adding to 140344521 its reverse (125443041), we get a palindrome (265787562).

The spelling of 140344521 in words is "one hundred forty million, three hundred forty-four thousand, five hundred twenty-one".