140555417 has 4 divisors (see below), whose sum is σ = 143207460. Its totient is φ = 137903376.

The previous prime is 140555413. The next prime is 140555419. The reversal of 140555417 is 714555041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 714555041 = 29 ⋅24639829.

It can be written as a sum of positive squares in 2 ways, for example, as 33825856 + 106729561 = 5816^2 + 10331^2 .

It is a cyclic number.

It is not a de Polignac number, because 140555417 - 2² = 140555413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140555411) 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, 1325942 + ... + 1326047.

It is an arithmetic number, because the mean of its divisors is an integer number (35801865).

Almost surely, 2^140555417 is an apocalyptic number.

It is an amenable number.

140555417 is a deficient number, since it is larger than the sum of its proper divisors (2652043).

140555417 is an equidigital number, since it uses as much as digits as its factorization.

140555417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652042.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 140555417 is about 11855.6069857262. The cubic root of 140555417 is about 519.9351706655.

The spelling of 140555417 in words is "one hundred forty million, five hundred fifty-five thousand, four hundred seventeen".