140582521 has 2 divisors, whose sum is σ = 140582522. Its totient is φ = 140582520.

The previous prime is 140582479. The next prime is 140582527. The reversal of 140582521 is 125285041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 30647296 = 10485^2 + 5536^2 .

It is a cyclic number.

It is not a de Polignac number, because 140582521 - 2⁹ = 140582009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140582521.

It is not a weakly prime, because it can be changed into another prime (140582527) by changing a digit.

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 as a sum of consecutive naturals, namely, 70291260 + 70291261.

It is an arithmetic number, because the mean of its divisors is an integer number (70291261).

Almost surely, 2^140582521 is an apocalyptic number.

It is an amenable number.

140582521 is a deficient number, since it is larger than the sum of its proper divisors (1).

140582521 is an equidigital number, since it uses as much as digits as its factorization.

140582521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 140582521 is about 11856.7500184494. The cubic root of 140582521 is about 519.9685890790.

It can be divided in two parts, 14058252 and 1, that added together give a triangular number (14058253 = T₅₃₀₂).

The spelling of 140582521 in words is "one hundred forty million, five hundred eighty-two thousand, five hundred twenty-one".