2563546 has 4 divisors (see below), whose sum is σ = 3845322. Its totient is φ = 1281772.

The previous prime is 2563543. The next prime is 2563553. The reversal of 2563546 is 6453652.

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

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 429025 = 1461^2 + 655^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2563543) by changing a digit.

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 as a sum of consecutive naturals, namely, 640885 + ... + 640888.

2^2563546 is an apocalyptic number.

2563546 is a deficient number, since it is larger than the sum of its proper divisors (1281776).

2563546 is a wasteful number, since it uses less digits than its factorization.

2563546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281775.

The product of its digits is 21600, while the sum is 31.

The square root of 2563546 is about 1601.1077415340. The cubic root of 2563546 is about 136.8612088299.

The spelling of 2563546 in words is "two million, five hundred sixty-three thousand, five hundred forty-six".