12551137 has 4 divisors (see below), whose sum is σ = 12558276. Its totient is φ = 12544000.

The previous prime is 12551131. The next prime is 12551179. The reversal of 12551137 is 73115521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 73115521 = 17 ⋅4300913.

It can be written as a sum of positive squares in 2 ways, for example, as 7311616 + 5239521 = 2704^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551137 - 2⁷ = 12551009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12551131) 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, 1137 + ... + 5137.

It is an arithmetic number, because the mean of its divisors is an integer number (3139569).

Almost surely, 2^12551137 is an apocalyptic number.

It is an amenable number.

12551137 is a deficient number, since it is larger than the sum of its proper divisors (7139).

12551137 is an equidigital number, since it uses as much as digits as its factorization.

12551137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138.

The product of its digits is 1050, while the sum is 25.

The square root of 12551137 is about 3542.7583886006. The cubic root of 12551137 is about 232.3954869996.

Adding to 12551137 its reverse (73115521), we get a palindrome (85666658).

The spelling of 12551137 in words is "twelve million, five hundred fifty-one thousand, one hundred thirty-seven".