26261251 has 4 divisors (see below), whose sum is σ = 26418672. Its totient is φ = 26103832.

The previous prime is 26261201. The next prime is 26261273. The reversal of 26261251 is 15216262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15216262 = 2 ⋅7608131.

It is a cyclic number.

It is not a de Polignac number, because 26261251 - 2¹⁵ = 26228483 is a prime.

It is a super-3 number, since 3×26261251³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26261201) 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, 78460 + ... + 78793.

It is an arithmetic number, because the mean of its divisors is an integer number (6604668).

Almost surely, 2^26261251 is an apocalyptic number.

26261251 is a deficient number, since it is larger than the sum of its proper divisors (157421).

26261251 is a wasteful number, since it uses less digits than its factorization.

26261251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157420.

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

The square root of 26261251 is about 5124.5732505254. The cubic root of 26261251 is about 297.2385519326.

The spelling of 26261251 in words is "twenty-six million, two hundred sixty-one thousand, two hundred fifty-one".