16712405 has 4 divisors (see below), whose sum is σ = 20054892. Its totient is φ = 13369920.

The previous prime is 16712389. The next prime is 16712417. The reversal of 16712405 is 50421761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50421761 = 13 ⋅3878597.

It can be written as a sum of positive squares in 2 ways, for example, as 5650129 + 11062276 = 2377^2 + 3326^2 .

It is not a de Polignac number, because 16712405 - 2⁴ = 16712389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671236 + ... + 1671245.

It is an arithmetic number, because the mean of its divisors is an integer number (5013723).

Almost surely, 2^16712405 is an apocalyptic number.

It is an amenable number.

16712405 is a deficient number, since it is larger than the sum of its proper divisors (3342487).

16712405 is an equidigital number, since it uses as much as digits as its factorization.

16712405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342486.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 16712405 is about 4088.0808455802. The cubic root of 16712405 is about 255.6699288161.

The spelling of 16712405 in words is "sixteen million, seven hundred twelve thousand, four hundred five".