1256606 has 16 divisors (see below), whose sum is σ = 2150064. Its totient is φ = 545664.

The previous prime is 1256597. The next prime is 1256611. The reversal of 1256606 is 6066521.

1256606 = T₁₉₆ + T₁₉₇ + ... + T₂₄₆.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 980 + ... + 1863.

It is an arithmetic number, because the mean of its divisors is an integer number (134379).

2^1256606 is an apocalyptic number.

1256606 is a deficient number, since it is larger than the sum of its proper divisors (893458).

1256606 is a wasteful number, since it uses less digits than its factorization.

1256606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1256606 is about 1120.9843888297. The cubic root of 1256606 is about 107.9111638013.

The spelling of 1256606 in words is "one million, two hundred fifty-six thousand, six hundred six".