4188561 has 16 divisors (see below), whose sum is σ = 6054720. Its totient is φ = 2560320.

The previous prime is 4188559. The next prime is 4188577. The reversal of 4188561 is 1658814.

It is not a de Polignac number, because 4188561 - 2¹ = 4188559 is a prime.

It is a Curzon number.

4188561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4188551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7975 + ... + 8483.

It is an arithmetic number, because the mean of its divisors is an integer number (378420).

Almost surely, 2^4188561 is an apocalyptic number.

It is an amenable number.

4188561 is a deficient number, since it is larger than the sum of its proper divisors (1866159).

4188561 is a wasteful number, since it uses less digits than its factorization.

4188561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 7680, while the sum is 33.

The square root of 4188561 is about 2046.5974201098. The cubic root of 4188561 is about 161.1962551493.

The spelling of 4188561 in words is "four million, one hundred eighty-eight thousand, five hundred sixty-one".