13609145 has 8 divisors (see below), whose sum is σ = 17815680. Its totient is φ = 9897520.

The previous prime is 13609121. The next prime is 13609147. The reversal of 13609145 is 54190631.

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

It is not a de Polignac number, because 13609145 - 2²² = 9414841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13609147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123665 + ... + 123774.

It is an arithmetic number, because the mean of its divisors is an integer number (2226960).

Almost surely, 2^13609145 is an apocalyptic number.

It is an amenable number.

13609145 is a deficient number, since it is larger than the sum of its proper divisors (4206535).

13609145 is a wasteful number, since it uses less digits than its factorization.

13609145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247455.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13609145 is about 3689.0574677009. The cubic root of 13609145 is about 238.7501283773.

Adding to 13609145 its reverse (54190631), we get a palindrome (67799776).

The spelling of 13609145 in words is "thirteen million, six hundred nine thousand, one hundred forty-five".