13515425 has 72 divisors (see below), whose sum is σ = 22900320. Its totient is φ = 7795200.

The previous prime is 13515419. The next prime is 13515427. The reversal of 13515425 is 52451531.

13515425 = 501² + 502² + ... + 549².

13515425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13515425 - 2⁴ = 13515409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13515394 and 13515403.

It is not an unprimeable number, because it can be changed into a prime (13515427) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 229046 + ... + 229104.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

Almost surely, 2^13515425 is an apocalyptic number.

It is an amenable number.

13515425 is a deficient number, since it is larger than the sum of its proper divisors (9384895).

13515425 is a wasteful number, since it uses less digits than its factorization.

13515425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 99 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 13515425 is about 3676.3330915465. Note that the first 3 decimals coincide. The cubic root of 13515425 is about 238.2008109116.

Adding to 13515425 its reverse (52451531), we get a palindrome (65966956).

It can be divided in two parts, 1351 and 5425, that added together give a palindrome (6776).

The spelling of 13515425 in words is "thirteen million, five hundred fifteen thousand, four hundred twenty-five".