11781225 has 18 divisors (see below), whose sum is σ = 21101886. Its totient is φ = 6283200.

The previous prime is 11781199. The next prime is 11781233. The reversal of 11781225 is 52218711.

11781225 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 2601 + 11778624 = 51^2 + 3432^2 .

It is not a de Polignac number, because 11781225 - 2²⁰ = 10732649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25956 + ... + 26405.

It is an arithmetic number, because the mean of its divisors is an integer number (1172327).

Almost surely, 2^11781225 is an apocalyptic number.

11781225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11781225 is a deficient number, since it is larger than the sum of its proper divisors (9320661).

11781225 is a wasteful number, since it uses less digits than its factorization.

11781225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52377 (or 52369 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 11781225 is about 3432.3789126494. The cubic root of 11781225 is about 227.5430019747.

Adding to 11781225 its reverse (52218711), we get a palindrome (63999936).

The spelling of 11781225 in words is "eleven million, seven hundred eighty-one thousand, two hundred twenty-five".