4027561 has 8 divisors (see below), whose sum is σ = 4164800. Its totient is φ = 3891888.

The previous prime is 4027559. The next prime is 4027579. The reversal of 4027561 is 1657204.

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

It is a cyclic number.

It is not a de Polignac number, because 4027561 - 2¹ = 4027559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4027501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7090 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (520600).

Almost surely, 2^4027561 is an apocalyptic number.

It is an amenable number.

4027561 is a deficient number, since it is larger than the sum of its proper divisors (137239).

4027561 is a wasteful number, since it uses less digits than its factorization.

4027561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 4027561 is about 2006.8784218283. The cubic root of 4027561 is about 159.1038573605.

The spelling of 4027561 in words is "four million, twenty-seven thousand, five hundred sixty-one".