26401513 has 6 divisors (see below), whose sum is σ = 27344174. Its totient is φ = 25490304.

The previous prime is 26401511. The next prime is 26401523. The reversal of 26401513 is 31510462.

It can be written as a sum of positive squares in 3 ways, for example, as 12652249 + 13749264 = 3557^2 + 3708^2 .

It is not a de Polignac number, because 26401513 - 2¹ = 26401511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26401511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14856 + ... + 16537.

Almost surely, 2^26401513 is an apocalyptic number.

It is an amenable number.

26401513 is a deficient number, since it is larger than the sum of its proper divisors (942661).

26401513 is an equidigital number, since it uses as much as digits as its factorization.

26401513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31451 (or 31422 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 26401513 is about 5138.2402629694. The cubic root of 26401513 is about 297.7667987720.

Adding to 26401513 its reverse (31510462), we get a palindrome (57911975).

The spelling of 26401513 in words is "twenty-six million, four hundred one thousand, five hundred thirteen".