11781297 has 24 divisors (see below), whose sum is σ = 18888480. Its totient is φ = 7015680.

The previous prime is 11781257. The next prime is 11781307. The reversal of 11781297 is 79218711.

11781297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11781297 - 2⁶ = 11781233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11781257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4833 + ... + 6849.

It is an arithmetic number, because the mean of its divisors is an integer number (787020).

Almost surely, 2^11781297 is an apocalyptic number.

It is an amenable number.

11781297 is a deficient number, since it is larger than the sum of its proper divisors (7107183).

11781297 is a wasteful number, since it uses less digits than its factorization.

11781297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093 (or 2090 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 11781297 is about 3432.3894009858. The cubic root of 11781297 is about 227.5434655106.

The spelling of 11781297 in words is "eleven million, seven hundred eighty-one thousand, two hundred ninety-seven".