140287145 has 8 divisors (see below), whose sum is σ = 178247304. Its totient is φ = 105627904.

The previous prime is 140287141. The next prime is 140287153. The reversal of 140287145 is 541782041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5053504 + 135233641 = 2248^2 + 11629^2 .

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 140287145 - 2² = 140287141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140287141) 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, 825134 + ... + 825303.

It is an arithmetic number, because the mean of its divisors is an integer number (22280913).

Almost surely, 2^140287145 is an apocalyptic number.

It is an amenable number.

140287145 is a deficient number, since it is larger than the sum of its proper divisors (37960159).

140287145 is a wasteful number, since it uses less digits than its factorization.

140287145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650459.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 140287145 is about 11844.2874416319. The cubic root of 140287145 is about 519.6041674506.

The spelling of 140287145 in words is "one hundred forty million, two hundred eighty-seven thousand, one hundred forty-five".