1201565 has 8 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 954832.

The previous prime is 1201559. The next prime is 1201567. The reversal of 1201565 is 5651021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201565 - 2⁸ = 1201309 is a prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116 + ... + 1554.

It is an arithmetic number, because the mean of its divisors is an integer number (181440).

2^1201565 is an apocalyptic number.

It is an amenable number.

1201565 is a deficient number, since it is larger than the sum of its proper divisors (249955).

1201565 is a wasteful number, since it uses less digits than its factorization.

1201565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1201565 is about 1096.1592037656. The cubic root of 1201565 is about 106.3120329798.

Adding to 1201565 its reverse (5651021), we get a palindrome (6852586).

The spelling of 1201565 in words is "one million, two hundred one thousand, five hundred sixty-five".