12126401 has 4 divisors (see below), whose sum is σ = 13858752. Its totient is φ = 10394052.

The previous prime is 12126353. The next prime is 12126403. The reversal of 12126401 is 10462121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10462121 = 1733 ⋅6037.

It is a cyclic number.

It is not a de Polignac number, because 12126401 - 2¹⁴ = 12110017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12126401.

It is not an unprimeable number, because it can be changed into a prime (12126403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866165 + ... + 866178.

It is an arithmetic number, because the mean of its divisors is an integer number (3464688).

Almost surely, 2^12126401 is an apocalyptic number.

It is an amenable number.

12126401 is a deficient number, since it is larger than the sum of its proper divisors (1732351).

12126401 is an equidigital number, since it uses as much as digits as its factorization.

12126401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732350.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 12126401 is about 3482.2982353612. The cubic root of 12126401 is about 229.7438926214.

Adding to 12126401 its reverse (10462121), we get a palindrome (22588522).

The spelling of 12126401 in words is "twelve million, one hundred twenty-six thousand, four hundred one".