11781270 has 48 divisors (see below), whose sum is σ = 31037760. Its totient is φ = 3100032.

The previous prime is 11781257. The next prime is 11781307. The reversal of 11781270 is 7218711.

11781270 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 is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6282 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (646620).

Almost surely, 2^11781270 is an apocalyptic number.

11781270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11781270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15518880).

11781270 is an abundant number, since it is smaller than the sum of its proper divisors (19256490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11781270 is a wasteful number, since it uses less digits than its factorization.

11781270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1746 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 11781270 is about 3432.3854678634. The cubic root of 11781270 is about 227.5432916849.

Adding to 11781270 its reverse (7218711), we get a palindrome (18999981).

The spelling of 11781270 in words is "eleven million, seven hundred eighty-one thousand, two hundred seventy".