140655985 has 8 divisors (see below), whose sum is σ = 169165800. Its totient is φ = 112272384.

The previous prime is 140655973. The next prime is 140655997. The reversal of 140655985 is 589556041.

It is an interprime number because it is at equal distance from previous prime (140655973) and next prime (140655997).

It can be written as a sum of positive squares in 4 ways, for example, as 9072144 + 131583841 = 3012^2 + 11471^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140655985 is a prime.

It is a super-2 number, since 2×140655985² = 39568212232640450, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29082 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (21145725).

Almost surely, 2^140655985 is an apocalyptic number.

It is an amenable number.

140655985 is a deficient number, since it is larger than the sum of its proper divisors (28509815).

140655985 is an equidigital number, since it uses as much as digits as its factorization.

140655985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63107.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 140655985 is about 11859.8475959854. The cubic root of 140655985 is about 520.0591463788.

The spelling of 140655985 in words is "one hundred forty million, six hundred fifty-five thousand, nine hundred eighty-five".