12061440 has 144 divisors (see below), whose sum is σ = 42924000. Its totient is φ = 3207168.

The previous prime is 12061433. The next prime is 12061471. The reversal of 12061440 is 4416021.

12061440 is a `hidden beast` number, since 12 + 0 + 614 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34386 + ... + 34734.

Almost surely, 2^12061440 is an apocalyptic number.

12061440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12061440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21462000).

12061440 is an abundant number, since it is smaller than the sum of its proper divisors (30862560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12061440 is an equidigital number, since it uses as much as digits as its factorization.

12061440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12061440 is about 3472.9583930707. The cubic root of 12061440 is about 229.3329126848.

Adding to 12061440 its reverse (4416021), we get a palindrome (16477461).

The spelling of 12061440 in words is "twelve million, sixty-one thousand, four hundred forty".