12551401 has 4 divisors (see below), whose sum is σ = 12723412. Its totient is φ = 12379392.

The previous prime is 12551393. The next prime is 12551417. The reversal of 12551401 is 10415521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10415521 = 1049 ⋅9929.

It can be written as a sum of positive squares in 2 ways, for example, as 5180176 + 7371225 = 2276^2 + 2715^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551401 - 2³ = 12551393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12551101) 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, 85896 + ... + 86041.

It is an arithmetic number, because the mean of its divisors is an integer number (3180853).

Almost surely, 2^12551401 is an apocalyptic number.

It is an amenable number.

12551401 is a deficient number, since it is larger than the sum of its proper divisors (172011).

12551401 is an equidigital number, since it uses as much as digits as its factorization.

12551401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172010.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 12551401 is about 3542.7956475078. The cubic root of 12551401 is about 232.3971163866.

Adding to 12551401 its reverse (10415521), we get a palindrome (22966922).

The spelling of 12551401 in words is "twelve million, five hundred fifty-one thousand, four hundred one".