1563123 has 4 divisors (see below), whose sum is σ = 2084168. Its totient is φ = 1042080.

The previous prime is 1563119. The next prime is 1563131. The reversal of 1563123 is 3213651.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1563123 - 2² = 1563119 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1563123.

It is not an unprimeable number, because it can be changed into a prime (1563143) 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, 260518 + ... + 260523.

It is an arithmetic number, because the mean of its divisors is an integer number (521042).

2^1563123 is an apocalyptic number.

1563123 is a deficient number, since it is larger than the sum of its proper divisors (521045).

1563123 is an equidigital number, since it uses as much as digits as its factorization.

1563123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521044.

The product of its digits is 540, while the sum is 21.

The square root of 1563123 is about 1250.2491751647. The cubic root of 1563123 is about 116.0551412435.

Adding to 1563123 its reverse (3213651), we get a palindrome (4776774).

The spelling of 1563123 in words is "one million, five hundred sixty-three thousand, one hundred twenty-three".