140809825 has 12 divisors (see below), whose sum is σ = 188035708. Its totient is φ = 103982400.

The previous prime is 140809811. The next prime is 140809849. The reversal of 140809825 is 528908041.

It can be written as a sum of positive squares in 6 ways, for example, as 53816896 + 86992929 = 7336^2 + 9327^2 .

It is not a de Polignac number, because 140809825 - 2⁹ = 140809313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216306 + ... + 216955.

Almost surely, 2^140809825 is an apocalyptic number.

It is an amenable number.

140809825 is a deficient number, since it is larger than the sum of its proper divisors (47225883).

140809825 is a wasteful number, since it uses less digits than its factorization.

140809825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433284 (or 433279 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 140809825 is about 11866.3315729841. The cubic root of 140809825 is about 520.2486791324.

The spelling of 140809825 in words is "one hundred forty million, eight hundred nine thousand, eight hundred twenty-five".