140286581 has 2 divisors, whose sum is σ = 140286582. Its totient is φ = 140286580.

The previous prime is 140286569. The next prime is 140286589. The reversal of 140286581 is 185682041.

140286581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134328100 + 5958481 = 11590^2 + 2441^2 .

It is a cyclic number.

It is not a de Polignac number, because 140286581 - 2²⁶ = 73177717 is a prime.

It is a super-2 number, since 2×140286581² = 39360649617339122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140286589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70143290 + 70143291.

It is an arithmetic number, because the mean of its divisors is an integer number (70143291).

Almost surely, 2^140286581 is an apocalyptic number.

It is an amenable number.

140286581 is a deficient number, since it is larger than the sum of its proper divisors (1).

140286581 is an equidigital number, since it uses as much as digits as its factorization.

140286581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 140286581 is about 11844.2636326620. The cubic root of 140286581 is about 519.6034711237.

The spelling of 140286581 in words is "one hundred forty million, two hundred eighty-six thousand, five hundred eighty-one".