13451261 has 4 divisors (see below), whose sum is σ = 13494012. Its totient is φ = 13408512.

The previous prime is 13451257. The next prime is 13451279. The reversal of 13451261 is 16215431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3648100 + 9803161 = 1910^2 + 3131^2 .

It is a cyclic number.

It is not a de Polignac number, because 13451261 - 2² = 13451257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13451201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20900 + ... + 21533.

It is an arithmetic number, because the mean of its divisors is an integer number (3373503).

Almost surely, 2^13451261 is an apocalyptic number.

It is an amenable number.

13451261 is a deficient number, since it is larger than the sum of its proper divisors (42751).

13451261 is an equidigital number, since it uses as much as digits as its factorization.

13451261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42750.

The product of its digits is 720, while the sum is 23.

The square root of 13451261 is about 3667.5960791777. The cubic root of 13451261 is about 237.8232628522.

Adding to 13451261 its reverse (16215431), we get a palindrome (29666692).

The spelling of 13451261 in words is "thirteen million, four hundred fifty-one thousand, two hundred sixty-one".