140285287 has 2 divisors, whose sum is σ = 140285288. Its totient is φ = 140285286.

The previous prime is 140285273. The next prime is 140285291. The reversal of 140285287 is 782582041.

140285287 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 is an emirp because it is prime and its reverse (782582041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140285287 - 2²³ = 131896679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140285237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70142643 + 70142644.

It is an arithmetic number, because the mean of its divisors is an integer number (70142644).

Almost surely, 2^140285287 is an apocalyptic number.

140285287 is a deficient number, since it is larger than the sum of its proper divisors (1).

140285287 is an equidigital number, since it uses as much as digits as its factorization.

140285287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 140285287 is about 11844.2090069367. The cubic root of 140285287 is about 519.6018735155.

The spelling of 140285287 in words is "one hundred forty million, two hundred eighty-five thousand, two hundred eighty-seven".