11980641 has 4 divisors (see below), whose sum is σ = 15974192. Its totient is φ = 7987092.

The previous prime is 11980613. The next prime is 11980669. The reversal of 11980641 is 14608911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14608911 = 3 ⋅4869637.

It is an interprime number because it is at equal distance from previous prime (11980613) and next prime (11980669).

It is not a de Polignac number, because 11980641 - 2⁵ = 11980609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11980599 and 11980608.

It is not an unprimeable number, because it can be changed into a prime (11980691) 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, 1996771 + ... + 1996776.

It is an arithmetic number, because the mean of its divisors is an integer number (3993548).

Almost surely, 2^11980641 is an apocalyptic number.

It is an amenable number.

11980641 is a deficient number, since it is larger than the sum of its proper divisors (3993551).

11980641 is an equidigital number, since it uses as much as digits as its factorization.

11980641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993550.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 11980641 is about 3461.3062563142. The cubic root of 11980641 is about 228.8196682299.

It can be divided in two parts, 11980 and 641, that added together give a palindrome (12621).

The spelling of 11980641 in words is "eleven million, nine hundred eighty thousand, six hundred forty-one".