140235409 has 8 divisors (see below), whose sum is σ = 149639840. Its totient is φ = 131033376.

The previous prime is 140235353. The next prime is 140235421. The reversal of 140235409 is 904532041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140235409 - 2⁷ = 140235281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140235449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49167 + ... + 51940.

It is an arithmetic number, because the mean of its divisors is an integer number (18704980).

Almost surely, 2^140235409 is an apocalyptic number.

140235409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

140235409 is a deficient number, since it is larger than the sum of its proper divisors (9404431).

140235409 is a wasteful number, since it uses less digits than its factorization.

140235409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101199.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 140235409 is about 11842.1032338010. The cubic root of 140235409 is about 519.5402852693.

The spelling of 140235409 in words is "one hundred forty million, two hundred thirty-five thousand, four hundred nine".