140445521 has 16 divisors (see below), whose sum is σ = 152530560. Its totient is φ = 128916480.

The previous prime is 140445491. The next prime is 140445533. The reversal of 140445521 is 125544041.

It is a cyclic number.

It is not a de Polignac number, because 140445521 - 2⁶ = 140445457 is a prime.

It is a super-2 number, since 2×140445521² = 39449888737922882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140645521) 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 in 15 ways as a sum of consecutive naturals, for example, 128186 + ... + 129276.

It is an arithmetic number, because the mean of its divisors is an integer number (9533160).

Almost surely, 2^140445521 is an apocalyptic number.

It is an amenable number.

140445521 is a deficient number, since it is larger than the sum of its proper divisors (12085039).

140445521 is a wasteful number, since it uses less digits than its factorization.

140445521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 140445521 is about 11850.9713104032. The cubic root of 140445521 is about 519.7996281753.

Adding to 140445521 its reverse (125544041), we get a palindrome (265989562).

The spelling of 140445521 in words is "one hundred forty million, four hundred forty-five thousand, five hundred twenty-one".