140438565 has 12 divisors (see below), whose sum is σ = 243426924. Its totient is φ = 74900544.

The previous prime is 140438539. The next prime is 140438591. The reversal of 140438565 is 565834041.

It is a happy number.

140438565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140438539) and next prime (140438591).

It can be written as a sum of positive squares in 2 ways, for example, as 76422564 + 64016001 = 8742^2 + 8001^2 .

It is not a de Polignac number, because 140438565 - 2⁵ = 140438533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1560384 + ... + 1560473.

It is an arithmetic number, because the mean of its divisors is an integer number (20285577).

Almost surely, 2^140438565 is an apocalyptic number.

140438565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140438565 is a deficient number, since it is larger than the sum of its proper divisors (102988359).

140438565 is a wasteful number, since it uses less digits than its factorization.

140438565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120868 (or 3120865 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 140438565 is about 11850.6778287151. The cubic root of 140438565 is about 519.7910464707.

The spelling of 140438565 in words is "one hundred forty million, four hundred thirty-eight thousand, five hundred sixty-five".