11645321 has 4 divisors (see below), whose sum is σ = 11671044. Its totient is φ = 11619600.

The previous prime is 11645317. The next prime is 11645329. The reversal of 11645321 is 12354611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12354611 = 23 ⋅537157.

It can be written as a sum of positive squares in 2 ways, for example, as 2524921 + 9120400 = 1589^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 11645321 - 2² = 11645317 is a prime.

It is a super-2 number, since 2×11645321² = 271227002386082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11645329) 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, 12170 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (2917761).

Almost surely, 2^11645321 is an apocalyptic number.

It is an amenable number.

11645321 is a deficient number, since it is larger than the sum of its proper divisors (25723).

11645321 is an equidigital number, since it uses as much as digits as its factorization.

11645321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25722.

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

The square root of 11645321 is about 3412.5241391088. The cubic root of 11645321 is about 226.6646642941.

Adding to 11645321 its reverse (12354611), we get a palindrome (23999932).

The spelling of 11645321 in words is "eleven million, six hundred forty-five thousand, three hundred twenty-one".