12146261 has 4 divisors (see below), whose sum is σ = 12161292. Its totient is φ = 12131232.

The previous prime is 12146221. The next prime is 12146287. The reversal of 12146261 is 16264121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16264121 = 17 ⋅956713.

It can be written as a sum of positive squares in 2 ways, for example, as 10923025 + 1223236 = 3305^2 + 1106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12146261 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 (12146201) 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, 6230 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (3040323).

Almost surely, 2^12146261 is an apocalyptic number.

It is an amenable number.

12146261 is a deficient number, since it is larger than the sum of its proper divisors (15031).

12146261 is an equidigital number, since it uses as much as digits as its factorization.

12146261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15030.

The product of its digits is 576, while the sum is 23.

The square root of 12146261 is about 3485.1486338462. The cubic root of 12146261 is about 229.8692451507.

The spelling of 12146261 in words is "twelve million, one hundred forty-six thousand, two hundred sixty-one".