10256605 has 4 divisors (see below), whose sum is σ = 12307932. Its totient is φ = 8205280.

The previous prime is 10256579. The next prime is 10256621. The reversal of 10256605 is 50665201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5044516 + 5212089 = 2246^2 + 2283^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10256605 is a prime.

It is a super-2 number, since 2×10256605² = 210395892252050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10256605.

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 3 ways as a sum of consecutive naturals, for example, 1025656 + ... + 1025665.

It is an arithmetic number, because the mean of its divisors is an integer number (3076983).

Almost surely, 2^10256605 is an apocalyptic number.

It is an amenable number.

10256605 is a deficient number, since it is larger than the sum of its proper divisors (2051327).

10256605 is an equidigital number, since it uses as much as digits as its factorization.

10256605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051326.

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

The square root of 10256605 is about 3202.5934802906. The cubic root of 10256605 is about 217.2707232945.

The spelling of 10256605 in words is "ten million, two hundred fifty-six thousand, six hundred five".