11969281 has 4 divisors (see below), whose sum is σ = 12031492. Its totient is φ = 11907072.

The previous prime is 11969273. The next prime is 11969311. The reversal of 11969281 is 18296911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18296911 = 907 ⋅20173.

It can be written as a sum of positive squares in 2 ways, for example, as 8761600 + 3207681 = 2960^2 + 1791^2 .

It is a cyclic number.

It is not a de Polignac number, because 11969281 - 2³ = 11969273 is a prime.

It is a super-2 number, since 2×11969281² = 286527375313922, 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 11969281.

It is not an unprimeable number, because it can be changed into a prime (11969201) 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, 30816 + ... + 31201.

It is an arithmetic number, because the mean of its divisors is an integer number (3007873).

Almost surely, 2^11969281 is an apocalyptic number.

It is an amenable number.

11969281 is a deficient number, since it is larger than the sum of its proper divisors (62211).

11969281 is an equidigital number, since it uses as much as digits as its factorization.

11969281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62210.

The product of its digits is 7776, while the sum is 37.

The square root of 11969281 is about 3459.6648681628. The cubic root of 11969281 is about 228.7473233684.

The spelling of 11969281 in words is "eleven million, nine hundred sixty-nine thousand, two hundred eighty-one".