13121425 has 6 divisors (see below), whose sum is σ = 16270598. Its totient is φ = 10497120.

The previous prime is 13121417. The next prime is 13121429. The reversal of 13121425 is 52412131.

It can be written as a sum of positive squares in 3 ways, for example, as 2039184 + 11082241 = 1428^2 + 3329^2 .

It is not a de Polignac number, because 13121425 - 2³ = 13121417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121429) by changing a digit.

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, 262404 + ... + 262453.

Almost surely, 2^13121425 is an apocalyptic number.

It is an amenable number.

13121425 is a deficient number, since it is larger than the sum of its proper divisors (3149173).

13121425 is an equidigital number, since it uses as much as digits as its factorization.

13121425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524867 (or 524862 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 13121425 is about 3622.3507560699. The cubic root of 13121425 is about 235.8632802380.

Adding to 13121425 its reverse (52412131), we get a palindrome (65533556).

The spelling of 13121425 in words is "thirteen million, one hundred twenty-one thousand, four hundred twenty-five".