140571217 has 4 divisors (see below), whose sum is σ = 142953840. Its totient is φ = 138188596.

The previous prime is 140571199. The next prime is 140571241. The reversal of 140571217 is 712175041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 712175041 = 151 ⋅4716391.

It is a cyclic number.

It is not a de Polignac number, because 140571217 - 2²⁷ = 6353489 is a prime.

It is a super-3 number, since 3×140571217³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140571287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191223 + ... + 1191340.

It is an arithmetic number, because the mean of its divisors is an integer number (35738460).

Almost surely, 2^140571217 is an apocalyptic number.

It is an amenable number.

140571217 is a deficient number, since it is larger than the sum of its proper divisors (2382623).

140571217 is an equidigital number, since it uses as much as digits as its factorization.

140571217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382622.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 140571217 is about 11856.2733183745. The cubic root of 140571217 is about 519.9546521105.

The spelling of 140571217 in words is "one hundred forty million, five hundred seventy-one thousand, two hundred seventeen".