16009601 has 4 divisors (see below), whose sum is σ = 16034772. Its totient is φ = 15984432.

The previous prime is 16009589. The next prime is 16009613. The reversal of 16009601 is 10690061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10690061 = 103 ⋅103787.

It is an interprime number because it is at equal distance from previous prime (16009589) and next prime (16009613).

It can be written as a sum of positive squares in 2 ways, for example, as 3591025 + 12418576 = 1895^2 + 3524^2 .

It is a cyclic number.

It is not a de Polignac number, because 16009601 - 2¹⁴ = 15993217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16009681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11606 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (4008693).

Almost surely, 2^16009601 is an apocalyptic number.

It is an amenable number.

16009601 is a deficient number, since it is larger than the sum of its proper divisors (25171).

16009601 is an equidigital number, since it uses as much as digits as its factorization.

16009601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25170.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 16009601 is about 4001.1999450165. The cubic root of 16009601 is about 252.0346019925.

Adding to 16009601 its reverse (10690061), we get a palindrome (26699662).

The spelling of 16009601 in words is "sixteen million, nine thousand, six hundred one".