11521747 has 2 divisors, whose sum is σ = 11521748. Its totient is φ = 11521746.

The previous prime is 11521717. The next prime is 11521751. The reversal of 11521747 is 74712511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11521747 is a prime.

It is not a weakly prime, because it can be changed into another prime (11521717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760873 + 5760874.

It is an arithmetic number, because the mean of its divisors is an integer number (5760874).

Almost surely, 2^11521747 is an apocalyptic number.

11521747 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521747 is an equidigital number, since it uses as much as digits as its factorization.

11521747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 28.

The square root of 11521747 is about 3394.3698973447. The cubic root of 11521747 is about 225.8600629512.

The spelling of 11521747 in words is "eleven million, five hundred twenty-one thousand, seven hundred forty-seven".