12055551 has 8 divisors (see below), whose sum is σ = 16101504. Its totient is φ = 8023320.

The previous prime is 12055531. The next prime is 12055553. The reversal of 12055551 is 15555021.

12055551 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12055551 - 2⁶ = 12055487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12055553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165 + ... + 5046.

It is an arithmetic number, because the mean of its divisors is an integer number (2012688).

Almost surely, 2^12055551 is an apocalyptic number.

12055551 is a deficient number, since it is larger than the sum of its proper divisors (4045953).

12055551 is an equidigital number, since it uses as much as digits as its factorization.

12055551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861.

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 12055551 is about 3472.1104533122. The cubic root of 12055551 is about 229.2955826649.

The spelling of 12055551 in words is "twelve million, fifty-five thousand, five hundred fifty-one".