140424217 has 4 divisors (see below), whose sum is σ = 140461776. Its totient is φ = 140386660.

The previous prime is 140424191. The next prime is 140424241. The reversal of 140424217 is 712424041.

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 a de Polignac number, because none of the positive numbers 2^k-140424217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140424191 and 140424200.

It is not an unprimeable number, because it can be changed into a prime (140424517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12463 + ... + 20884.

It is an arithmetic number, because the mean of its divisors is an integer number (35115444).

Almost surely, 2^140424217 is an apocalyptic number.

It is an amenable number.

140424217 is a deficient number, since it is larger than the sum of its proper divisors (37559).

140424217 is an equidigital number, since it uses as much as digits as its factorization.

140424217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37558.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 140424217 is about 11850.0724470359. The cubic root of 140424217 is about 519.7733442678.

Adding to 140424217 its reverse (712424041), we get a palindrome (852848258).

The spelling of 140424217 in words is "one hundred forty million, four hundred twenty-four thousand, two hundred seventeen".