26671261 has 2 divisors, whose sum is σ = 26671262. Its totient is φ = 26671260.

The previous prime is 26671247. The next prime is 26671273. The reversal of 26671261 is 16217662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21335161 + 5336100 = 4619^2 + 2310^2 .

It is a cyclic number.

It is not a de Polignac number, because 26671261 - 2⁷ = 26671133 is a prime.

It is a super-2 number, since 2×26671261² = 1422712326660242, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1663861 and since 26671261 and 1663861 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26671241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13335630 + 13335631.

It is an arithmetic number, because the mean of its divisors is an integer number (13335631).

Almost surely, 2^26671261 is an apocalyptic number.

26671261 is the 2761-st centered heptagonal number.

It is an amenable number.

26671261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26671261 is an equidigital number, since it uses as much as digits as its factorization.

26671261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 26671261 is about 5164.4226201968. The cubic root of 26671261 is about 298.7774730079. Note that the first 3 decimals are identical.

The spelling of 26671261 in words is "twenty-six million, six hundred seventy-one thousand, two hundred sixty-one".