11515489 has 2 divisors, whose sum is σ = 11515490. Its totient is φ = 11515488.

The previous prime is 11515481. The next prime is 11515499. The reversal of 11515489 is 98451511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10349089 + 1166400 = 3217^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515489 - 2³ = 11515481 is a prime.

It is not a weakly prime, because it can be changed into another prime (11515481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757744 + 5757745.

It is an arithmetic number, because the mean of its divisors is an integer number (5757745).

Almost surely, 2^11515489 is an apocalyptic number.

It is an amenable number.

11515489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515489 is an equidigital number, since it uses as much as digits as its factorization.

11515489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 34.

The square root of 11515489 is about 3393.4479515678. The cubic root of 11515489 is about 225.8191638222.

The spelling of 11515489 in words is "eleven million, five hundred fifteen thousand, four hundred eighty-nine".