13645405 has 8 divisors (see below), whose sum is σ = 16755552. Its totient is φ = 10662288.

The previous prime is 13645393. The next prime is 13645447. The reversal of 13645405 is 50454631.

13645405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13645405 - 2¹⁹ = 13121117 is a prime.

It is a super-2 number, since 2×13645405² = 372394155228050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31519 + ... + 31948.

It is an arithmetic number, because the mean of its divisors is an integer number (2094444).

Almost surely, 2^13645405 is an apocalyptic number.

It is an amenable number.

13645405 is a deficient number, since it is larger than the sum of its proper divisors (3110147).

13645405 is an equidigital number, since it uses as much as digits as its factorization.

13645405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63515.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 13645405 is about 3693.9687329483. The cubic root of 13645405 is about 238.9619810792.

The spelling of 13645405 in words is "thirteen million, six hundred forty-five thousand, four hundred five".