1256506 has 8 divisors (see below), whose sum is σ = 1893024. Its totient is φ = 625500.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256506 is 6056521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750 + ... + 1753.

It is an arithmetic number, because the mean of its divisors is an integer number (236628).

2^1256506 is an apocalyptic number.

1256506 is a deficient number, since it is larger than the sum of its proper divisors (636518).

1256506 is a wasteful number, since it uses less digits than its factorization.

1256506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1256506 is about 1120.9397842882. The cubic root of 1256506 is about 107.9083012221.

It can be divided in two parts, 1256 and 506, that multiplied together give a palindrome (635536).

The spelling of 1256506 in words is "one million, two hundred fifty-six thousand, five hundred six".