140524921 has 2 divisors, whose sum is σ = 140524922. Its totient is φ = 140524920.

The previous prime is 140524831. The next prime is 140524939. The reversal of 140524921 is 129425041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73874025 + 66650896 = 8595^2 + 8164^2 .

It is a cyclic number.

It is not a de Polignac number, because 140524921 - 2¹⁹ = 140000633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140524921.

It is not a weakly prime, because it can be changed into another prime (140524121) 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, 70262460 + 70262461.

It is an arithmetic number, because the mean of its divisors is an integer number (70262461).

Almost surely, 2^140524921 is an apocalyptic number.

It is an amenable number.

140524921 is a deficient number, since it is larger than the sum of its proper divisors (1).

140524921 is an equidigital number, since it uses as much as digits as its factorization.

140524921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 140524921 is about 11854.3207734564. The cubic root of 140524921 is about 519.8975648817.

Adding to 140524921 its reverse (129425041), we get a palindrome (269949962).

The spelling of 140524921 in words is "one hundred forty million, five hundred twenty-four thousand, nine hundred twenty-one".