13573261 has 4 divisors (see below), whose sum is σ = 14617372. Its totient is φ = 12529152.

The previous prime is 13573249. The next prime is 13573267. The reversal of 13573261 is 16237531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16237531 = 43 ⋅377617.

It can be written as a sum of positive squares in 2 ways, for example, as 570025 + 13003236 = 755^2 + 3606^2 .

It is a cyclic number.

It is not a de Polignac number, because 13573261 - 2²¹ = 11476109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13573267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522036 + ... + 522061.

It is an arithmetic number, because the mean of its divisors is an integer number (3654343).

Almost surely, 2^13573261 is an apocalyptic number.

It is an amenable number.

13573261 is a deficient number, since it is larger than the sum of its proper divisors (1044111).

13573261 is a wasteful number, since it uses less digits than its factorization.

13573261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044110.

The product of its digits is 3780, while the sum is 28.

The square root of 13573261 is about 3684.1906845330. The cubic root of 13573261 is about 238.5401016973.

The spelling of 13573261 in words is "thirteen million, five hundred seventy-three thousand, two hundred sixty-one".