12551425 has 6 divisors (see below), whose sum is σ = 15563798. Its totient is φ = 10041120.

The previous prime is 12551417. The next prime is 12551437. The reversal of 12551425 is 52415521.

It can be written as a sum of positive squares in 3 ways, for example, as 2666689 + 9884736 = 1633^2 + 3144^2 .

It is not a de Polignac number, because 12551425 - 2³ = 12551417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 502057 = 12551425 / (1 + 2 + 5 + 5 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12551425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 251004 + ... + 251053.

Almost surely, 2^12551425 is an apocalyptic number.

It is an amenable number.

12551425 is a deficient number, since it is larger than the sum of its proper divisors (3012373).

12551425 is an equidigital number, since it uses as much as digits as its factorization.

12551425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502067 (or 502062 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 12551425 is about 3542.7990346617. The cubic root of 12551425 is about 232.3972645116.

Adding to 12551425 its reverse (52415521), we get a palindrome (64966946).

The spelling of 12551425 in words is "twelve million, five hundred fifty-one thousand, four hundred twenty-five".