140521 has 2 divisors, whose sum is σ = 140522.
Its totient is φ = 140520.
The previous prime is 140477. The next prime is 140527. The reversal of 140521 is 125041.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 114921 + 25600 = 339^2 + 160^2
It is a cyclic number.
It is not a de Polignac number, because 140521 - 29 = 140009 is a prime.
It is not a weakly prime, because it can be changed into another prime (140527) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70260 + 70261.
It is an arithmetic number, because the mean of its divisors is an integer number (70261).
2140521 is an apocalyptic number.
It is an amenable number.
140521 is a deficient number, since it is larger than the sum of its proper divisors (1).
140521 is an equidigital number, since it uses as much as digits as its factorization.
140521 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 40, while the sum is 13.
The square root of 140521 is about 374.8613076859.
The cubic root of 140521 is about 51.9892729352.
Adding to 140521 its reverse (125041), we get a palindrome (265562).
The spelling of 140521 in words is "one hundred forty thousand, five hundred twenty-one".