11645261 has 4 divisors (see below), whose sum is σ = 11704572. Its totient is φ = 11585952.

The previous prime is 11645219. The next prime is 11645287. The reversal of 11645261 is 16254611.

11645261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11519236 + 126025 = 3394^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 11645261 - 2⁶ = 11645197 is a prime.

It is a super-2 number, since 2×11645261² = 271224207516242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11645261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11645761) 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, 29360 + ... + 29753.

It is an arithmetic number, because the mean of its divisors is an integer number (2926143).

Almost surely, 2^11645261 is an apocalyptic number.

It is an amenable number.

11645261 is a deficient number, since it is larger than the sum of its proper divisors (59311).

11645261 is an equidigital number, since it uses as much as digits as its factorization.

11645261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59310.

The product of its digits is 1440, while the sum is 26.

The square root of 11645261 is about 3412.5153479508. The cubic root of 11645261 is about 226.6642750132.

Adding to 11645261 its reverse (16254611), we get a palindrome (27899872).

It can be divided in two parts, 11645 and 261, that multiplied together give a triangular number (3039345 = T₂₄₆₅).

The spelling of 11645261 in words is "eleven million, six hundred forty-five thousand, two hundred sixty-one".