13261634 has 4 divisors (see below), whose sum is σ = 19892454. Its totient is φ = 6630816.

The previous prime is 13261631. The next prime is 13261667. The reversal of 13261634 is 43616231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43616231 = 2089 ⋅20879.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 2059225 = 3347^2 + 1435^2 .

It is not an unprimeable number, because it can be changed into a prime (13261631) 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 as a sum of consecutive naturals, namely, 3315407 + ... + 3315410.

Almost surely, 2^13261634 is an apocalyptic number.

13261634 is a deficient number, since it is larger than the sum of its proper divisors (6630820).

13261634 is an equidigital number, since it uses as much as digits as its factorization.

13261634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630819.

The product of its digits is 2592, while the sum is 26.

The square root of 13261634 is about 3641.6526468075. The cubic root of 13261634 is about 236.7004113315.

Adding to 13261634 its reverse (43616231), we get a palindrome (56877865).

The spelling of 13261634 in words is "thirteen million, two hundred sixty-one thousand, six hundred thirty-four".