4225581 has 16 divisors (see below), whose sum is σ = 6590400. Its totient is φ = 2668464.

The previous prime is 4225549. The next prime is 4225589. The reversal of 4225581 is 1855224.

It is a happy number.

It is not a de Polignac number, because 4225581 - 2⁵ = 4225549 is a prime.

It is a super-2 number, since 2×4225581² = 35711069575122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 4² + 2 + 2²² + 5⁶ + 5⁶ + 8 + 1 .

4225581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4225589) 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, 3606 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (411900).

Almost surely, 2^4225581 is an apocalyptic number.

It is an amenable number.

4225581 is a deficient number, since it is larger than the sum of its proper divisors (2364819).

4225581 is a wasteful number, since it uses less digits than its factorization.

4225581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8265 (or 8259 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 4225581 is about 2055.6218037373. The cubic root of 4225581 is about 161.6697662400.

The spelling of 4225581 in words is "four million, two hundred twenty-five thousand, five hundred eighty-one".