140342405 has 16 divisors (see below), whose sum is σ = 194240640. Its totient is φ = 95349312.

The previous prime is 140342401. The next prime is 140342437. The reversal of 140342405 is 504243041.

It is a cyclic number.

It is not a de Polignac number, because 140342405 - 2² = 140342401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140342401) 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 15 ways as a sum of consecutive naturals, for example, 14579 + ... + 22208.

It is an arithmetic number, because the mean of its divisors is an integer number (12140040).

Almost surely, 2^140342405 is an apocalyptic number.

It is an amenable number.

140342405 is a deficient number, since it is larger than the sum of its proper divisors (53898235).

140342405 is a wasteful number, since it uses less digits than its factorization.

140342405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36908.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 140342405 is about 11846.6199820877. The cubic root of 140342405 is about 519.6723836249.

Adding to 140342405 its reverse (504243041), we get a palindrome (644585446).

The spelling of 140342405 in words is "one hundred forty million, three hundred forty-two thousand, four hundred five".