26109261 has 6 divisors (see below), whose sum is σ = 37713390. Its totient is φ = 17406168.

The previous prime is 26109241. The next prime is 26109269. The reversal of 26109261 is 16290162.

It can be written as a sum of positive squares in only one way, i.e., 26071236 + 38025 = 5106^2 + 195^2 .

It is not a de Polignac number, because 26109261 - 2⁷ = 26109133 is a prime.

It is a super-2 number, since 2×26109261² = 1363387019932242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26109269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1450506 + ... + 1450523.

It is an arithmetic number, because the mean of its divisors is an integer number (6285565).

Almost surely, 2^26109261 is an apocalyptic number.

It is an amenable number.

26109261 is a deficient number, since it is larger than the sum of its proper divisors (11604129).

26109261 is a wasteful number, since it uses less digits than its factorization.

26109261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901035 (or 2901032 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 26109261 is about 5109.7222037993. The cubic root of 26109261 is about 296.6640080279.

The spelling of 26109261 in words is "twenty-six million, one hundred nine thousand, two hundred sixty-one".