140782405 has 16 divisors (see below), whose sum is σ = 171453744. Its totient is φ = 110960640.

The previous prime is 140782403. The next prime is 140782409. The reversal of 140782405 is 504287041.

It can be written as a sum of positive squares in 8 ways, for example, as 11710084 + 129072321 = 3422^2 + 11361^2 .

It is not a de Polignac number, because 140782405 - 2¹ = 140782403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140782403) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 135769 + ... + 136801.

It is an arithmetic number, because the mean of its divisors is an integer number (10715859).

Almost surely, 2^140782405 is an apocalyptic number.

It is an amenable number.

140782405 is a deficient number, since it is larger than the sum of its proper divisors (30671339).

140782405 is a wasteful number, since it uses less digits than its factorization.

140782405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 140782405 is about 11865.1761470279. The cubic root of 140782405 is about 520.2149074718.

The spelling of 140782405 in words is "one hundred forty million, seven hundred eighty-two thousand, four hundred five".