4219561 has 4 divisors (see below), whose sum is σ = 4236624. Its totient is φ = 4202500.

The previous prime is 4219549. The next prime is 4219571. The reversal of 4219561 is 1659124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4219561 - 2²¹ = 2122409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4219571) 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, 8155 + ... + 8656.

It is an arithmetic number, because the mean of its divisors is an integer number (1059156).

Almost surely, 2^4219561 is an apocalyptic number.

It is an amenable number.

4219561 is a deficient number, since it is larger than the sum of its proper divisors (17063).

4219561 is a wasteful number, since it uses less digits than its factorization.

4219561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17062.

The product of its digits is 2160, while the sum is 28.

The square root of 4219561 is about 2054.1570047102. The cubic root of 4219561 is about 161.5929551425.

The spelling of 4219561 in words is "four million, two hundred nineteen thousand, five hundred sixty-one".