12061559 has 4 divisors (see below), whose sum is σ = 12068520. Its totient is φ = 12054600.

The previous prime is 12061549. The next prime is 12061579. The reversal of 12061559 is 95516021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95516021 = 19 ⋅5027159.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12061559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12061549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1409 + ... + 5109.

It is an arithmetic number, because the mean of its divisors is an integer number (3017130).

Almost surely, 2^12061559 is an apocalyptic number.

12061559 is a deficient number, since it is larger than the sum of its proper divisors (6961).

12061559 is an equidigital number, since it uses as much as digits as its factorization.

12061559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 12061559 is about 3472.9755253961. The cubic root of 12061559 is about 229.3336668934. Note that the first 3 decimals are identical.

The spelling of 12061559 in words is "twelve million, sixty-one thousand, five hundred fifty-nine".