8561144 has 16 divisors (see below), whose sum is σ = 16394400. Its totient is φ = 4189312.

The previous prime is 8561131. The next prime is 8561159. The reversal of 8561144 is 4411658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11009 + ... + 11760.

It is an arithmetic number, because the mean of its divisors is an integer number (1024650).

Almost surely, 2^8561144 is an apocalyptic number.

It is an amenable number.

8561144 is a deficient number, since it is larger than the sum of its proper divisors (7833256).

8561144 is a wasteful number, since it uses less digits than its factorization.

8561144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22822 (or 22818 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 8561144 is about 2925.9432667090. The cubic root of 8561144 is about 204.5709368268.

The spelling of 8561144 in words is "eight million, five hundred sixty-one thousand, one hundred forty-four".