4069561 has 4 divisors (see below), whose sum is σ = 4075300. Its totient is φ = 4063824.

The previous prime is 4069543. The next prime is 4069567. The reversal of 4069561 is 1659604.

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 3459600 + 609961 = 1860^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 4069561 - 2⁵ = 4069529 is a prime.

It is a super-2 number, since 2×4069561² = 33122653465442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4069567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1626 + ... + 3283.

It is an arithmetic number, because the mean of its divisors is an integer number (1018825).

Almost surely, 2^4069561 is an apocalyptic number.

It is an amenable number.

4069561 is a deficient number, since it is larger than the sum of its proper divisors (5739).

4069561 is an equidigital number, since it uses as much as digits as its factorization.

4069561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4069561 is about 2017.3152951386. The cubic root of 4069561 is about 159.6549988108.

The spelling of 4069561 in words is "four million, sixty-nine thousand, five hundred sixty-one".