140555521 has 16 divisors (see below), whose sum is σ = 152616960. Its totient is φ = 129018960.

The previous prime is 140555497. The next prime is 140555537. The reversal of 140555521 is 125555041.

It is a cyclic number.

It is not a de Polignac number, because 140555521 - 2¹⁹ = 140031233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140555521.

It is not an unprimeable number, because it can be changed into a prime (140555021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94816 + ... + 96286.

It is an arithmetic number, because the mean of its divisors is an integer number (9538560).

Almost surely, 2^140555521 is an apocalyptic number.

It is an amenable number.

140555521 is a deficient number, since it is larger than the sum of its proper divisors (12061439).

140555521 is a wasteful number, since it uses less digits than its factorization.

140555521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 140555521 is about 11855.6113718357. The cubic root of 140555521 is about 519.9352989026.

The spelling of 140555521 in words is "one hundred forty million, five hundred fifty-five thousand, five hundred twenty-one".