13642705 has 4 divisors (see below), whose sum is σ = 16371252. Its totient is φ = 10914160.

The previous prime is 13642693. The next prime is 13642723. The reversal of 13642705 is 50724631.

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 6395841 + 7246864 = 2529^2 + 2692^2 .

It is not a de Polignac number, because 13642705 - 2⁹ = 13642193 is a prime.

It is a super-2 number, since 2×13642705² = 372246799434050, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 1364266 + ... + 1364275.

It is an arithmetic number, because the mean of its divisors is an integer number (4092813).

Almost surely, 2^13642705 is an apocalyptic number.

It is an amenable number.

13642705 is a deficient number, since it is larger than the sum of its proper divisors (2728547).

13642705 is an equidigital number, since it uses as much as digits as its factorization.

13642705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728546.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 13642705 is about 3693.6032542762. The cubic root of 13642705 is about 238.9462189989.

The spelling of 13642705 in words is "thirteen million, six hundred forty-two thousand, seven hundred five".