12261478 has 4 divisors (see below), whose sum is σ = 18392220. Its totient is φ = 6130738.

The previous prime is 12261463. The next prime is 12261481. The reversal of 12261478 is 87416221.

12261478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065368 + ... + 3065371.

It is an arithmetic number, because the mean of its divisors is an integer number (4598055).

Almost surely, 2^12261478 is an apocalyptic number.

12261478 is a deficient number, since it is larger than the sum of its proper divisors (6130742).

12261478 is an equidigital number, since it uses as much as digits as its factorization.

12261478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6130741.

The product of its digits is 5376, while the sum is 31.

The square root of 12261478 is about 3501.6393303708. The cubic root of 12261478 is about 230.5937902063.

Adding to 12261478 its reverse (87416221), we get a palindrome (99677699).

It can be divided in two parts, 1226 and 1478, that added together give a square (2704 = 52²).

The spelling of 12261478 in words is "twelve million, two hundred sixty-one thousand, four hundred seventy-eight".