26981321 has 8 divisors (see below), whose sum is σ = 27724200. Its totient is φ = 26242560.

The previous prime is 26981303. The next prime is 26981333. The reversal of 26981321 is 12318962.

It can be written as a sum of positive squares in 4 ways, for example, as 10465225 + 16516096 = 3235^2 + 4064^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26981321 - 2⁶ = 26981257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26981351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15965 + ... + 17573.

It is an arithmetic number, because the mean of its divisors is an integer number (3465525).

Almost surely, 2^26981321 is an apocalyptic number.

It is an amenable number.

26981321 is a deficient number, since it is larger than the sum of its proper divisors (742879).

26981321 is a wasteful number, since it uses less digits than its factorization.

26981321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059.

The product of its digits is 5184, while the sum is 32.

The square root of 26981321 is about 5194.3547241212. The cubic root of 26981321 is about 299.9308025588.

The spelling of 26981321 in words is "twenty-six million, nine hundred eighty-one thousand, three hundred twenty-one".