140933521 has 2 divisors, whose sum is σ = 140933522. Its totient is φ = 140933520.

The previous prime is 140933501. The next prime is 140933537. The reversal of 140933521 is 125339041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107744400 + 33189121 = 10380^2 + 5761^2 .

It is an emirp because it is prime and its reverse (125339041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140933521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140933521.

It is not a weakly prime, because it can be changed into another prime (140933501) 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, 70466760 + 70466761.

It is an arithmetic number, because the mean of its divisors is an integer number (70466761).

Almost surely, 2^140933521 is an apocalyptic number.

It is an amenable number.

140933521 is a deficient number, since it is larger than the sum of its proper divisors (1).

140933521 is an equidigital number, since it uses as much as digits as its factorization.

140933521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 140933521 is about 11871.5424861304. The cubic root of 140933521 is about 520.4009740119.

It can be divided in two parts, 140 and 933521, that added together give a triangular number (933661 = T₁₃₆₆).

The spelling of 140933521 in words is "one hundred forty million, nine hundred thirty-three thousand, five hundred twenty-one".