26324561 has 4 divisors (see below), whose sum is σ = 26770800. Its totient is φ = 25878324.

The previous prime is 26324537. The next prime is 26324563. The reversal of 26324561 is 16542362.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16542362 = 2 ⋅8271181.

It is a cyclic number.

It is not a de Polignac number, because 26324561 - 2¹⁰ = 26323537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26324563) 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, 223031 + ... + 223148.

It is an arithmetic number, because the mean of its divisors is an integer number (6692700).

Almost surely, 2^26324561 is an apocalyptic number.

It is an amenable number.

26324561 is a deficient number, since it is larger than the sum of its proper divisors (446239).

26324561 is an equidigital number, since it uses as much as digits as its factorization.

26324561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446238.

The product of its digits is 8640, while the sum is 29.

The square root of 26324561 is about 5130.7466318266. The cubic root of 26324561 is about 297.4772187908.

The spelling of 26324561 in words is "twenty-six million, three hundred twenty-four thousand, five hundred sixty-one".