140520641 has 8 divisors (see below), whose sum is σ = 142865280. Its totient is φ = 138183408.

The previous prime is 140520629. The next prime is 140520643. The reversal of 140520641 is 146025041.

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 140520641 - 2¹⁸ = 140258497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140520643) 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, 46715 + ... + 49631.

It is an arithmetic number, because the mean of its divisors is an integer number (17858160).

Almost surely, 2^140520641 is an apocalyptic number.

It is an amenable number.

140520641 is a deficient number, since it is larger than the sum of its proper divisors (2344639).

140520641 is an equidigital number, since it uses as much as digits as its factorization.

140520641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 140520641 is about 11854.1402471879. The cubic root of 140520641 is about 519.8922866147.

Adding to 140520641 its reverse (146025041), we get a palindrome (286545682).

The spelling of 140520641 in words is "one hundred forty million, five hundred twenty thousand, six hundred forty-one".