8425581 has 4 divisors (see below), whose sum is σ = 11234112. Its totient is φ = 5617052.

The previous prime is 8425577. The next prime is 8425589. The reversal of 8425581 is 1855248.

8425581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8425581 - 2² = 8425577 is a prime.

It is a super-2 number, since 2×8425581² = 141980830375122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8425589) 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, 1404261 + ... + 1404266.

It is an arithmetic number, because the mean of its divisors is an integer number (2808528).

Almost surely, 2^8425581 is an apocalyptic number.

It is an amenable number.

8425581 is a deficient number, since it is larger than the sum of its proper divisors (2808531).

8425581 is a wasteful number, since it uses less digits than its factorization.

8425581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808530.

The product of its digits is 12800, while the sum is 33.

The square root of 8425581 is about 2902.6851362144. The cubic root of 8425581 is about 203.4854149045.

The spelling of 8425581 in words is "eight million, four hundred twenty-five thousand, five hundred eighty-one".