26155261 has 4 divisors (see below), whose sum is σ = 28533024. Its totient is φ = 23777500.

The previous prime is 26155249. The next prime is 26155271. The reversal of 26155261 is 16255162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26155261 - 2¹⁵ = 26122493 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 (26155201) 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, 1188865 + ... + 1188886.

It is an arithmetic number, because the mean of its divisors is an integer number (7133256).

Almost surely, 2^26155261 is an apocalyptic number.

It is an amenable number.

26155261 is a deficient number, since it is larger than the sum of its proper divisors (2377763).

26155261 is a wasteful number, since it uses less digits than its factorization.

26155261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377762.

The product of its digits is 3600, while the sum is 28.

The square root of 26155261 is about 5114.2214461245. The cubic root of 26155261 is about 296.8381293601.

Subtracting from 26155261 its reverse (16255162), we obtain a palindrome (9900099).

The spelling of 26155261 in words is "twenty-six million, one hundred fifty-five thousand, two hundred sixty-one".