1205601 has 4 divisors (see below), whose sum is σ = 1607472. Its totient is φ = 803732.

The previous prime is 1205563. The next prime is 1205609. The reversal of 1205601 is 1065021.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1065021 = 3 ⋅355007.

It is a cyclic number.

It is not a de Polignac number, because 1205601 - 2⁶ = 1205537 is a prime.

It is a D-number.

It is a Curzon number.

1205601 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1205609) 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, 200931 + ... + 200936.

It is an arithmetic number, because the mean of its divisors is an integer number (401868).

2^1205601 is an apocalyptic number.

It is an amenable number.

1205601 is a deficient number, since it is larger than the sum of its proper divisors (401871).

1205601 is an equidigital number, since it uses as much as digits as its factorization.

1205601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401870.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1205601 is about 1097.9986338789. The cubic root of 1205601 is about 106.4309323166.

The spelling of 1205601 in words is "one million, two hundred five thousand, six hundred one".