340142405 has 16 divisors (see below), whose sum is σ = 420572784. Its totient is φ = 263969280.

The previous prime is 340142381. The next prime is 340142459. The reversal of 340142405 is 504241043.

It can be written as a sum of positive squares in 8 ways, for example, as 104734756 + 235407649 = 10234^2 + 15343^2 .

It is a de Polignac number, because none of the positive numbers 2^k-340142405 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14627 + ... + 29903.

It is an arithmetic number, because the mean of its divisors is an integer number (26285799).

Almost surely, 2^340142405 is an apocalyptic number.

It is an amenable number.

340142405 is a deficient number, since it is larger than the sum of its proper divisors (80430379).

340142405 is a wasteful number, since it uses less digits than its factorization.

340142405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15416.

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

The square root of 340142405 is about 18442.9500080654. The cubic root of 340142405 is about 698.0506342526.

Adding to 340142405 its reverse (504241043), we get a palindrome (844383448).

The spelling of 340142405 in words is "three hundred forty million, one hundred forty-two thousand, four hundred five".