1563345 has 36 divisors (see below), whose sum is σ = 3156660. Its totient is φ = 713664.

The previous prime is 1563329. The next prime is 1563389. The reversal of 1563345 is 5433651.

It can be written as a sum of positive squares in 2 ways, for example, as 370881 + 1192464 = 609^2 + 1092^2 .

It is not a de Polignac number, because 1563345 - 2⁴ = 1563329 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1851 + ... + 2559.

It is an arithmetic number, because the mean of its divisors is an integer number (87685).

2^1563345 is an apocalyptic number.

1563345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1563345 is an abundant number, since it is smaller than the sum of its proper divisors (1593315).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1563345 is a wasteful number, since it uses less digits than its factorization.

1563345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 724 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 1563345 is about 1250.3379543148. The cubic root of 1563345 is about 116.0606351643.

Adding to 1563345 its reverse (5433651), we get a palindrome (6996996).

The spelling of 1563345 in words is "one million, five hundred sixty-three thousand, three hundred forty-five".