26161285 has 4 divisors (see below), whose sum is σ = 31393548. Its totient is φ = 20929024.

The previous prime is 26161259. The next prime is 26161307. The reversal of 26161285 is 58216162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58216162 = 2 ⋅29108081.

It can be written as a sum of positive squares in 2 ways, for example, as 19027044 + 7134241 = 4362^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 26161285 - 2¹⁹ = 25636997 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2616124 + ... + 2616133.

It is an arithmetic number, because the mean of its divisors is an integer number (7848387).

Almost surely, 2^26161285 is an apocalyptic number.

It is an amenable number.

26161285 is a deficient number, since it is larger than the sum of its proper divisors (5232263).

26161285 is an equidigital number, since it uses as much as digits as its factorization.

26161285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232262.

The product of its digits is 5760, while the sum is 31.

The square root of 26161285 is about 5114.8103581658. The cubic root of 26161285 is about 296.8609165618.

The spelling of 26161285 in words is "twenty-six million, one hundred sixty-one thousand, two hundred eighty-five".