26816121 has 6 divisors (see below), whose sum is σ = 38734410. Its totient is φ = 17877408.

The previous prime is 26816099. The next prime is 26816131. The reversal of 26816121 is 12161862.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 10169721 = 4080^2 + 3189^2 .

It is not a de Polignac number, because 26816121 - 2⁶ = 26816057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26816131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1489776 + ... + 1489793.

It is an arithmetic number, because the mean of its divisors is an integer number (6455735).

Almost surely, 2^26816121 is an apocalyptic number.

It is an amenable number.

26816121 is a deficient number, since it is larger than the sum of its proper divisors (11918289).

26816121 is a wasteful number, since it uses less digits than its factorization.

26816121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979575 (or 2979572 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 26816121 is about 5178.4284295527. The cubic root of 26816121 is about 299.3174147692.

Adding to 26816121 its reverse (12161862), we get a palindrome (38977983).

The spelling of 26816121 in words is "twenty-six million, eight hundred sixteen thousand, one hundred twenty-one".