11987530 has 16 divisors (see below), whose sum is σ = 21749760. Its totient is φ = 4756752.

The previous prime is 11987501. The next prime is 11987579. The reversal of 11987530 is 3578911.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 3450 + ... + 5989.

It is an arithmetic number, because the mean of its divisors is an integer number (1359360).

Almost surely, 2^11987530 is an apocalyptic number.

11987530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11987530 is a deficient number, since it is larger than the sum of its proper divisors (9762230).

11987530 is a wasteful number, since it uses less digits than its factorization.

11987530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9573.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 11987530 is about 3462.3012578342. The cubic root of 11987530 is about 228.8635177661.

The spelling of 11987530 in words is "eleven million, nine hundred eighty-seven thousand, five hundred thirty".