12271078 has 4 divisors (see below), whose sum is σ = 18406620. Its totient is φ = 6135538.

The previous prime is 12271073. The next prime is 12271079. The reversal of 12271078 is 87017221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12271073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3067768 + ... + 3067771.

It is an arithmetic number, because the mean of its divisors is an integer number (4601655).

Almost surely, 2^12271078 is an apocalyptic number.

12271078 is a deficient number, since it is larger than the sum of its proper divisors (6135542).

12271078 is an equidigital number, since it uses as much as digits as its factorization.

12271078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6135541.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 12271078 is about 3503.0098486873. The cubic root of 12271078 is about 230.6539548647.

Adding to 12271078 its reverse (87017221), we get a palindrome (99288299).

The spelling of 12271078 in words is "twelve million, two hundred seventy-one thousand, seventy-eight".