2600506 has 4 divisors (see below), whose sum is σ = 3900762. Its totient is φ = 1300252.

The previous prime is 2600503. The next prime is 2600509. The reversal of 2600506 is 6050062.

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

It is an interprime number because it is at equal distance from previous prime (2600503) and next prime (2600509).

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 654481 = 1395^2 + 809^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2600503) 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, 650125 + ... + 650128.

2^2600506 is an apocalyptic number.

2600506 is a deficient number, since it is larger than the sum of its proper divisors (1300256).

2600506 is a wasteful number, since it uses less digits than its factorization.

2600506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300255.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2600506 is about 1612.6084459657. The cubic root of 2600506 is about 137.5158064473.

Adding to 2600506 its reverse (6050062), we get a palindrome (8650568).

The spelling of 2600506 in words is "two million, six hundred thousand, five hundred six".