11619521 has 2 divisors, whose sum is σ = 11619522. Its totient is φ = 11619520.

The previous prime is 11619511. The next prime is 11619527. The reversal of 11619521 is 12591611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 2768896 = 2975^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 11619521 - 2⁶ = 11619457 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11619527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809760 + 5809761.

It is an arithmetic number, because the mean of its divisors is an integer number (5809761).

Almost surely, 2^11619521 is an apocalyptic number.

It is an amenable number.

11619521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11619521 is an equidigital number, since it uses as much as digits as its factorization.

11619521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 26.

The square root of 11619521 is about 3408.7418500086. The cubic root of 11619521 is about 226.4971500242.

The spelling of 11619521 in words is "eleven million, six hundred nineteen thousand, five hundred twenty-one".