13240025 has 12 divisors (see below), whose sum is σ = 17383932. Its totient is φ = 9968640.

The previous prime is 13240021. The next prime is 13240049. The reversal of 13240025 is 52004231.

It can be written as a sum of positive squares in 6 ways, for example, as 200704 + 13039321 = 448^2 + 3611^2 .

It is not a de Polignac number, because 13240025 - 2² = 13240021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13239985 and 13240012.

It is not an unprimeable number, because it can be changed into a prime (13240021) 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 11 ways as a sum of consecutive naturals, for example, 15152 + ... + 16001.

It is an arithmetic number, because the mean of its divisors is an integer number (1448661).

Almost surely, 2^13240025 is an apocalyptic number.

It is an amenable number.

13240025 is a deficient number, since it is larger than the sum of its proper divisors (4143907).

13240025 is a wasteful number, since it uses less digits than its factorization.

13240025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31180 (or 31175 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 13240025 is about 3638.6845150411. The cubic root of 13240025 is about 236.5717786201.

Adding to 13240025 its reverse (52004231), we get a palindrome (65244256).

The spelling of 13240025 in words is "thirteen million, two hundred forty thousand, twenty-five".