11654981 has 4 divisors (see below), whose sum is σ = 12551532. Its totient is φ = 10758432.

The previous prime is 11654971. The next prime is 11654983. The reversal of 11654981 is 18945611.

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 3441025 + 8213956 = 1855^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 11654981 - 2¹⁴ = 11638597 is a prime.

It is a super-2 number, since 2×11654981² = 271677164220722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11654983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448256 + ... + 448281.

It is an arithmetic number, because the mean of its divisors is an integer number (3137883).

Almost surely, 2^11654981 is an apocalyptic number.

It is an amenable number.

11654981 is a deficient number, since it is larger than the sum of its proper divisors (896551).

11654981 is an equidigital number, since it uses as much as digits as its factorization.

11654981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896550.

The product of its digits is 8640, while the sum is 35.

The square root of 11654981 is about 3413.9392203143. The cubic root of 11654981 is about 226.7273210900.

The spelling of 11654981 in words is "eleven million, six hundred fifty-four thousand, nine hundred eighty-one".