26245217 has 4 divisors (see below), whose sum is σ = 26255556. Its totient is φ = 26234880.

The previous prime is 26245211. The next prime is 26245243. The reversal of 26245217 is 71254262.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 71254262 = 2 ⋅35627131.

It can be written as a sum of positive squares in 2 ways, for example, as 23001616 + 3243601 = 4796^2 + 1801^2 .

It is a cyclic number.

It is not a de Polignac number, because 26245217 - 2¹⁰ = 26244193 is a prime.

It is a super-2 number, since 2×26245217² = 1377622830754178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26245217.

It is not an unprimeable number, because it can be changed into a prime (26245211) 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, 1553 + ... + 7409.

It is an arithmetic number, because the mean of its divisors is an integer number (6563889).

Almost surely, 2^26245217 is an apocalyptic number.

It is an amenable number.

26245217 is a deficient number, since it is larger than the sum of its proper divisors (10339).

26245217 is an equidigital number, since it uses as much as digits as its factorization.

26245217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338.

The product of its digits is 6720, while the sum is 29.

The square root of 26245217 is about 5123.0085887103. The cubic root of 26245217 is about 297.1780458886.

Adding to 26245217 its reverse (71254262), we get a palindrome (97499479).

It can be divided in two parts, 26245 and 217, that added together give a palindrome (26462).

The spelling of 26245217 in words is "twenty-six million, two hundred forty-five thousand, two hundred seventeen".