26515081 has 4 divisors (see below), whose sum is σ = 26540100. Its totient is φ = 26490064.

The previous prime is 26515079. The next prime is 26515103. The reversal of 26515081 is 18051562.

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 921600 + 25593481 = 960^2 + 5059^2 .

It is a cyclic number.

It is not a de Polignac number, because 26515081 - 2¹ = 26515079 is a prime.

It is a super-2 number, since 2×26515081² = 1406099040873122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26515031) 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, 10846 + ... + 13063.

It is an arithmetic number, because the mean of its divisors is an integer number (6635025).

Almost surely, 2^26515081 is an apocalyptic number.

It is an amenable number.

26515081 is a deficient number, since it is larger than the sum of its proper divisors (25019).

26515081 is a wasteful number, since it uses less digits than its factorization.

26515081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25018.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 26515081 is about 5149.2796583600. The cubic root of 26515081 is about 298.1931431121.

The spelling of 26515081 in words is "twenty-six million, five hundred fifteen thousand, eighty-one".