4256545261 has 4 divisors (see below), whose sum is σ = 4264413724. Its totient is φ = 4248676800.

The previous prime is 4256545259. The next prime is 4256545273. The reversal of 4256545261 is 1625456524.

It is a happy number.

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 2473172361 + 1783372900 = 49731^2 + 42230^2 .

It is a cyclic number.

It is not a de Polignac number, because 4256545261 - 2¹ = 4256545259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256575261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3933420 + ... + 3934501.

It is an arithmetic number, because the mean of its divisors is an integer number (1066103431).

Almost surely, 2^4256545261 is an apocalyptic number.

It is an amenable number.

4256545261 is a deficient number, since it is larger than the sum of its proper divisors (7868463).

4256545261 is an equidigital number, since it uses as much as digits as its factorization.

4256545261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868462.

The product of its digits is 288000, while the sum is 40.

The square root of 4256545261 is about 65242.2045994769. The cubic root of 4256545261 is about 1620.6370076534.

The spelling of 4256545261 in words is "four billion, two hundred fifty-six million, five hundred forty-five thousand, two hundred sixty-one".