26481521 has 4 divisors (see below), whose sum is σ = 28888944. Its totient is φ = 24074100.

The previous prime is 26481517. The next prime is 26481541. The reversal of 26481521 is 12518462.

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 26481521 - 2² = 26481517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26481541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1203695 + ... + 1203716.

It is an arithmetic number, because the mean of its divisors is an integer number (7222236).

Almost surely, 2^26481521 is an apocalyptic number.

It is an amenable number.

26481521 is a deficient number, since it is larger than the sum of its proper divisors (2407423).

26481521 is a wasteful number, since it uses less digits than its factorization.

26481521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407422.

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

The square root of 26481521 is about 5146.0199183447. The cubic root of 26481521 is about 298.0672828273.

Adding to 26481521 its reverse (12518462), we get a palindrome (38999983).

The spelling of 26481521 in words is "twenty-six million, four hundred eighty-one thousand, five hundred twenty-one".