13261601 has 4 divisors (see below), whose sum is σ = 13959600. Its totient is φ = 12563604.

The previous prime is 13261579. The next prime is 13261621. The reversal of 13261601 is 10616231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13261601 - 2¹⁸ = 12999457 is a prime.

It is a super-2 number, since 2×13261601² = 351740122166402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261621) 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, 348971 + ... + 349008.

It is an arithmetic number, because the mean of its divisors is an integer number (3489900).

Almost surely, 2^13261601 is an apocalyptic number.

It is an amenable number.

13261601 is a deficient number, since it is larger than the sum of its proper divisors (697999).

13261601 is an equidigital number, since it uses as much as digits as its factorization.

13261601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697998.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 13261601 is about 3641.6481158948. The cubic root of 13261601 is about 236.7002149978.

Adding to 13261601 its reverse (10616231), we get a palindrome (23877832).

The spelling of 13261601 in words is "thirteen million, two hundred sixty-one thousand, six hundred one".