1406142005405 has 4 divisors (see below), whose sum is σ = 1687370406492. Its totient is φ = 1124913604320.

The previous prime is 1406142005381. The next prime is 1406142005441. The reversal of 1406142005405 is 5045002416041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 566156924356 + 839985081049 = 752434^2 + 916507^2 .

It is not a de Polignac number, because 1406142005405 - 2²² = 1406137811101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140614200536 + ... + 140614200545.

It is an arithmetic number, because the mean of its divisors is an integer number (421842601623).

Almost surely, 2^{1406142005405} is an apocalyptic number.

It is an amenable number.

1406142005405 is a deficient number, since it is larger than the sum of its proper divisors (281228401087).

1406142005405 is an equidigital number, since it uses as much as digits as its factorization.

1406142005405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281228401086.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 1406142005405 in words is "one trillion, four hundred six billion, one hundred forty-two million, five thousand, four hundred five".