12271400 has 24 divisors (see below), whose sum is σ = 28531470. Its totient is φ = 4908480.

The previous prime is 12271349. The next prime is 12271403. The reversal of 12271400 is 417221.

It can be written as a sum of positive squares in 3 ways, for example, as 11464996 + 806404 = 3386^2 + 898^2 .

It is not an unprimeable number, because it can be changed into a prime (12271403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30479 + ... + 30878.

Almost surely, 2^12271400 is an apocalyptic number.

12271400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12271400 is an abundant number, since it is smaller than the sum of its proper divisors (16260070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12271400 is a wasteful number, since it uses less digits than its factorization.

12271400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61373 (or 61364 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 12271400 is about 3503.0558088617. The cubic root of 12271400 is about 230.6559723436.

Adding to 12271400 its reverse (417221), we get a palindrome (12688621).

The spelling of 12271400 in words is "twelve million, two hundred seventy-one thousand, four hundred".