140625281 has 2 divisors, whose sum is σ = 140625282. Its totient is φ = 140625280.

The previous prime is 140625257. The next prime is 140625283. The reversal of 140625281 is 182526041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 5856400 = 11609^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 140625281 - 2⁶ = 140625217 is a prime.

It is a super-2 number, since 2×140625281² = 39550939312657922, which contains 22 as substring.

Together with 140625283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140625283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70312640 + 70312641.

It is an arithmetic number, because the mean of its divisors is an integer number (70312641).

Almost surely, 2^140625281 is an apocalyptic number.

It is an amenable number.

140625281 is a deficient number, since it is larger than the sum of its proper divisors (1).

140625281 is an equidigital number, since it uses as much as digits as its factorization.

140625281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 140625281 is about 11858.5530736258. The cubic root of 140625281 is about 520.0213021352.

The spelling of 140625281 in words is "one hundred forty million, six hundred twenty-five thousand, two hundred eighty-one".