26271961 has 4 divisors (see below), whose sum is σ = 26982052. Its totient is φ = 25561872.

The previous prime is 26271923. The next prime is 26271967. The reversal of 26271961 is 16917262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16917262 = 2 ⋅8458631.

It can be written as a sum of positive squares in 2 ways, for example, as 25190361 + 1081600 = 5019^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 26271961 - 2¹⁷ = 26140889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26271967) 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, 354990 + ... + 355063.

It is an arithmetic number, because the mean of its divisors is an integer number (6745513).

Almost surely, 2^26271961 is an apocalyptic number.

It is an amenable number.

26271961 is a deficient number, since it is larger than the sum of its proper divisors (710091).

26271961 is an equidigital number, since it uses as much as digits as its factorization.

26271961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710090.

The product of its digits is 9072, while the sum is 34.

The square root of 26271961 is about 5125.6181090674. The cubic root of 26271961 is about 297.2789535650.

The spelling of 26271961 in words is "twenty-six million, two hundred seventy-one thousand, nine hundred sixty-one".