1301609 has 4 divisors (see below), whose sum is σ = 1321104. Its totient is φ = 1282116.

The previous prime is 1301603. The next prime is 1301617. The reversal of 1301609 is 9061031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1301609 - 2⁸ = 1301353 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 (1301603) 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, 9647 + ... + 9780.

It is an arithmetic number, because the mean of its divisors is an integer number (330276).

2^1301609 is an apocalyptic number.

It is an amenable number.

1301609 is a deficient number, since it is larger than the sum of its proper divisors (19495).

1301609 is an equidigital number, since it uses as much as digits as its factorization.

1301609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19494.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1301609 is about 1140.8808000839. The cubic root of 1301609 is about 109.1842966949.

The spelling of 1301609 in words is "one million, three hundred one thousand, six hundred nine".