26521261 has 4 divisors (see below), whose sum is σ = 28561372. Its totient is φ = 24481152.

The previous prime is 26521259. The next prime is 26521279. The reversal of 26521261 is 16212562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16402500 + 10118761 = 4050^2 + 3181^2 .

It is a cyclic number.

It is not a de Polignac number, because 26521261 - 2¹ = 26521259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26521211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020036 + ... + 1020061.

It is an arithmetic number, because the mean of its divisors is an integer number (7140343).

Almost surely, 2^26521261 is an apocalyptic number.

It is an amenable number.

26521261 is a deficient number, since it is larger than the sum of its proper divisors (2040111).

26521261 is a wasteful number, since it uses less digits than its factorization.

26521261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040110.

The product of its digits is 1440, while the sum is 25.

The square root of 26521261 is about 5149.8797073330. The cubic root of 26521261 is about 298.2163084253.

The spelling of 26521261 in words is "twenty-six million, five hundred twenty-one thousand, two hundred sixty-one".