12135401 has 4 divisors (see below), whose sum is σ = 12334404. Its totient is φ = 11936400.

The previous prime is 12135367. The next prime is 12135413. The reversal of 12135401 is 10453121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7027801 + 5107600 = 2651^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 12135401 - 2⁶ = 12135337 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 12135401.

It is not an unprimeable number, because it can be changed into a prime (12135451) 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, 99410 + ... + 99531.

It is an arithmetic number, because the mean of its divisors is an integer number (3083601).

Almost surely, 2^12135401 is an apocalyptic number.

It is an amenable number.

12135401 is a deficient number, since it is larger than the sum of its proper divisors (199003).

12135401 is an equidigital number, since it uses as much as digits as its factorization.

12135401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199002.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 12135401 is about 3483.5902457092. The cubic root of 12135401 is about 229.8007158484.

Adding to 12135401 its reverse (10453121), we get a palindrome (22588522).

The spelling of 12135401 in words is "twelve million, one hundred thirty-five thousand, four hundred one".