12551801 has 4 divisors (see below), whose sum is σ = 12582900. Its totient is φ = 12520704.

The previous prime is 12551789. The next prime is 12551857. The reversal of 12551801 is 10815521.

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 12082576 + 469225 = 3476^2 + 685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12551801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12551881) 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, 14936 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (3145725).

Almost surely, 2^12551801 is an apocalyptic number.

It is an amenable number.

12551801 is a deficient number, since it is larger than the sum of its proper divisors (31099).

12551801 is an equidigital number, since it uses as much as digits as its factorization.

12551801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31098.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 12551801 is about 3542.8520996508. The cubic root of 12551801 is about 232.3995851113.

The spelling of 12551801 in words is "twelve million, five hundred fifty-one thousand, eight hundred one".