12265561 has 8 divisors (see below), whose sum is σ = 15292224. Its totient is φ = 9557520.

The previous prime is 12265523. The next prime is 12265573. The reversal of 12265561 is 16556221.

12265561 is digitally balanced in base 2, 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 12265561 - 2⁷ = 12265433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12265511) 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, 79570 + ... + 79723.

It is an arithmetic number, because the mean of its divisors is an integer number (1911528).

Almost surely, 2^12265561 is an apocalyptic number.

12265561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12265561 is a deficient number, since it is larger than the sum of its proper divisors (3026663).

12265561 is a wasteful number, since it uses less digits than its factorization.

12265561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159311.

The product of its digits is 3600, while the sum is 28.

The square root of 12265561 is about 3502.2222944867. Note that the first 4 decimals coincide. The cubic root of 12265561 is about 230.6193828240.

The spelling of 12265561 in words is "twelve million, two hundred sixty-five thousand, five hundred sixty-one".