140521512 has 64 divisors (see below), whose sum is σ = 368179200. Its totient is φ = 44637120.

The previous prime is 140521471. The next prime is 140521517. The reversal of 140521512 is 215125041.

It is a super-2 number, since 2×140521512² = 39492590669532288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140521517) 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 in 15 ways as a sum of consecutive naturals, for example, 48439 + ... + 51257.

It is an arithmetic number, because the mean of its divisors is an integer number (5752800).

Almost surely, 2^140521512 is an apocalyptic number.

140521512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140521512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184089600).

140521512 is an abundant number, since it is smaller than the sum of its proper divisors (227657688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140521512 is a wasteful number, since it uses less digits than its factorization.

140521512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926 (or 2922 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 140521512 is about 11854.1769853499. The cubic root of 140521512 is about 519.8933607754.

Adding to 140521512 its reverse (215125041), we get a palindrome (355646553).

The spelling of 140521512 in words is "one hundred forty million, five hundred twenty-one thousand, five hundred twelve".