140521544 has 8 divisors (see below), whose sum is σ = 263477910. Its totient is φ = 70260768.

The previous prime is 140521519. The next prime is 140521547. The reversal of 140521544 is 445125041.

It can be written as a sum of positive squares in only one way, i.e., 115820644 + 24700900 = 10762^2 + 4970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (140521547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8782589 + ... + 8782604.

Almost surely, 2^140521544 is an apocalyptic number.

It is an amenable number.

140521544 is a deficient number, since it is larger than the sum of its proper divisors (122956366).

140521544 is a wasteful number, since it uses less digits than its factorization.

140521544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17565199 (or 17565195 counting only the distinct ones).

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

The square root of 140521544 is about 11854.1783350851. The cubic root of 140521544 is about 519.8934002393.

Adding to 140521544 its reverse (445125041), we get a palindrome (585646585).

The spelling of 140521544 in words is "one hundred forty million, five hundred twenty-one thousand, five hundred forty-four".