13309261 has 8 divisors (see below), whose sum is σ = 15701504. Its totient is φ = 11039760.

The previous prime is 13309243. The next prime is 13309271. The reversal of 13309261 is 16290331.

13309261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13309261 - 2⁵ = 13309229 is a prime.

It is a super-2 number, since 2×13309261² = 354272856732242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309271) 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, 30450 + ... + 30883.

It is an arithmetic number, because the mean of its divisors is an integer number (1962688).

Almost surely, 2^13309261 is an apocalyptic number.

It is an amenable number.

13309261 is a deficient number, since it is larger than the sum of its proper divisors (2392243).

13309261 is an equidigital number, since it uses as much as digits as its factorization.

13309261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61371.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 13309261 is about 3648.1859875834. The cubic root of 13309261 is about 236.9834297969.

Adding to 13309261 its reverse (16290331), we get a palindrome (29599592).

The spelling of 13309261 in words is "thirteen million, three hundred nine thousand, two hundred sixty-one".