1209601 has 4 divisors (see below), whose sum is σ = 1280772. Its totient is φ = 1138432.

The previous prime is 1209587. The next prime is 1209617. The reversal of 1209601 is 1069021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1069021 = 59 ⋅18119.

It can be written as a sum of positive squares in 2 ways, for example, as 442225 + 767376 = 665^2 + 876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209601 is a prime.

It is a Duffinian number.

1209601 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1209631) 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, 35560 + ... + 35593.

It is an arithmetic number, because the mean of its divisors is an integer number (320193).

2^1209601 is an apocalyptic number.

It is an amenable number.

1209601 is a deficient number, since it is larger than the sum of its proper divisors (71171).

1209601 is an equidigital number, since it uses as much as digits as its factorization.

1209601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71170.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1209601 is about 1099.8186214099. The cubic root of 1209601 is about 106.5485095710.

The spelling of 1209601 in words is "one million, two hundred nine thousand, six hundred one".