12400127 has 2 divisors, whose sum is σ = 12400128. Its totient is φ = 12400126.

The previous prime is 12400109. The next prime is 12400169. The reversal of 12400127 is 72100421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12400127 - 2¹² = 12396031 is a prime.

It is a super-2 number, since 2×12400127² = 307526299232258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200063 + 6200064.

It is an arithmetic number, because the mean of its divisors is an integer number (6200064).

Almost surely, 2^12400127 is an apocalyptic number.

12400127 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400127 is an equidigital number, since it uses as much as digits as its factorization.

12400127 is an evil number, because the sum of its binary digits is even.

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

The square root of 12400127 is about 3521.3814050739. The cubic root of 12400127 is about 231.4596956456.

Adding to 12400127 its reverse (72100421), we get a palindrome (84500548).

The spelling of 12400127 in words is "twelve million, four hundred thousand, one hundred twenty-seven".