1201563 has 24 divisors (see below), whose sum is σ = 1937520. Its totient is φ = 711360.

The previous prime is 1201559. The next prime is 1201567. The reversal of 1201563 is 3651021.

It is an interprime number because it is at equal distance from previous prime (1201559) and next prime (1201567).

It is not a de Polignac number, because 1201563 - 2² = 1201559 is a prime.

It is a plaindrome in base 16.

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 23 ways as a sum of consecutive naturals, for example, 5133 + ... + 5361.

It is an arithmetic number, because the mean of its divisors is an integer number (80730).

2^1201563 is an apocalyptic number.

1201563 is a deficient number, since it is larger than the sum of its proper divisors (735957).

1201563 is a wasteful number, since it uses less digits than its factorization.

1201563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1201563 is about 1096.1582914890. The cubic root of 1201563 is about 106.3119739944.

Adding to 1201563 its reverse (3651021), we get a palindrome (4852584).

It can be divided in two parts, 1201 and 563, that added together give a square (1764 = 42²).

The spelling of 1201563 in words is "one million, two hundred one thousand, five hundred sixty-three".