24866561 has 4 divisors (see below), whose sum is σ = 24984624. Its totient is φ = 24748500.

The previous prime is 24866539. The next prime is 24866579. The reversal of 24866561 is 16566842.

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 24866561 - 2¹⁸ = 24604417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24866521) 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, 58715 + ... + 59136.

It is an arithmetic number, because the mean of its divisors is an integer number (6246156).

Almost surely, 2^24866561 is an apocalyptic number.

It is an amenable number.

24866561 is a deficient number, since it is larger than the sum of its proper divisors (118063).

24866561 is a wasteful number, since it uses less digits than its factorization.

24866561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118062.

The product of its digits is 69120, while the sum is 38.

The square root of 24866561 is about 4986.6382463540. The cubic root of 24866561 is about 291.8806081302.

The spelling of 24866561 in words is "twenty-four million, eight hundred sixty-six thousand, five hundred sixty-one".