11981026 has 4 divisors (see below), whose sum is σ = 17971542. Its totient is φ = 5990512.

The previous prime is 11981023. The next prime is 11981027. The reversal of 11981026 is 62018911.

It is a happy number.

11981026 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 only one way, i.e., 6245001 + 5736025 = 2499^2 + 2395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11980985 and 11981003.

It is not an unprimeable number, because it can be changed into a prime (11981023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2995255 + ... + 2995258.

Almost surely, 2^11981026 is an apocalyptic number.

11981026 is a deficient number, since it is larger than the sum of its proper divisors (5990516).

11981026 is an equidigital number, since it uses as much as digits as its factorization.

11981026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990515.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 11981026 is about 3461.3618707093. The cubic root of 11981026 is about 228.8221192571.

Adding to 11981026 its reverse (62018911), we get a palindrome (73999937).

The spelling of 11981026 in words is "eleven million, nine hundred eighty-one thousand, twenty-six".