11989525 has 6 divisors (see below), whose sum is σ = 14867042. Its totient is φ = 9591600.

The previous prime is 11989519. The next prime is 11989531. The reversal of 11989525 is 52598911.

It is an interprime number because it is at equal distance from previous prime (11989519) and next prime (11989531).

It can be written as a sum of positive squares in 3 ways, for example, as 3363556 + 8625969 = 1834^2 + 2937^2 .

It is not a de Polignac number, because 11989525 - 2⁵ = 11989493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239766 + ... + 239815.

Almost surely, 2^11989525 is an apocalyptic number.

It is an amenable number.

11989525 is a deficient number, since it is larger than the sum of its proper divisors (2877517).

11989525 is an equidigital number, since it uses as much as digits as its factorization.

11989525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479591 (or 479586 counting only the distinct ones).

The product of its digits is 32400, while the sum is 40.

The square root of 11989525 is about 3462.5893490277. The cubic root of 11989525 is about 228.8762131085.

The spelling of 11989525 in words is "eleven million, nine hundred eighty-nine thousand, five hundred twenty-five".