26406505 has 8 divisors (see below), whose sum is σ = 31763592. Its totient is φ = 21074688.

The previous prime is 26406503. The next prime is 26406517. The reversal of 26406505 is 50560462.

It can be written as a sum of positive squares in 4 ways, for example, as 1125721 + 25280784 = 1061^2 + 5028^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26406505 - 2¹ = 26406503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26406503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3934 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (3970449).

Almost surely, 2^26406505 is an apocalyptic number.

It is an amenable number.

26406505 is a deficient number, since it is larger than the sum of its proper divisors (5357087).

26406505 is a wasteful number, since it uses less digits than its factorization.

26406505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12635.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 26406505 is about 5138.7260094307. The cubic root of 26406505 is about 297.7855648453.

Adding to 26406505 its reverse (50560462), we get a palindrome (76966967).

The spelling of 26406505 in words is "twenty-six million, four hundred six thousand, five hundred five".