3812561 has 4 divisors (see below), whose sum is σ = 3875124. Its totient is φ = 3750000.

The previous prime is 3812533. The next prime is 3812569. The reversal of 3812561 is 1652183.

3812561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2235025 + 1577536 = 1495^2 + 1256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3812561 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 3812561.

It is not an unprimeable number, because it can be changed into a prime (3812569) by changing a digit.

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, 31190 + ... + 31311.

It is an arithmetic number, because the mean of its divisors is an integer number (968781).

Almost surely, 2^3812561 is an apocalyptic number.

It is an amenable number.

3812561 is a deficient number, since it is larger than the sum of its proper divisors (62563).

3812561 is an equidigital number, since it uses as much as digits as its factorization.

3812561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62562.

The product of its digits is 1440, while the sum is 26.

The square root of 3812561 is about 1952.5780394135. The cubic root of 3812561 is about 156.2208274070.

It can be divided in two parts, 38125 and 61, that multiplied together give a square (2325625 = 1525²).

The spelling of 3812561 in words is "three million, eight hundred twelve thousand, five hundred sixty-one".